ALBERT

Description: This study is intended as a continuation of the \xe2\x80\x9cPreliminary List of Syrphidae\xe2\x80\x9d published in volume V of this journal. As no further information on the Syrphid flies of the other Guianas has come to my knowledge these countries can be left out of consideration here. \nSince the dispatch of the manuscript of the \xe2\x80\x9cPreliminary List\xe2\x80\x9d to the editors several species not yet known from Suriname have been received. Once again a large part of these flies were collected by my son Drs. P. H. van Doesburg junior. Dr. D. C. Geijskes, Director of the Suriname Museum, Paramaribo, has also sent me big lots of Syrphids in which many interesting species were represented. To both gentlemen I wish to express heartfelt appreciation. Moreover my son deserves special thanks for interrupting his own demanding work to produce the beautiful, exact illustrations.

Description: Dr. G. KRUSEMAN, Head of the Department of Entomology of the Zoological Museum, Amsterdam, kindly entrusted me the examination of the Syrphid flies collected by Mr. A. PETER during the 4th Dutch Karakorum Expedition, 1935. Leader of this expedition was the wellknown alpinist and geographical explorer Dr. Ph. C. VISSER. I am indebted to Dr. G. KRUSEMAN who gave me the opportunity to study this material. I also wish to thank my son, Mr. P. H. VAN DOESBURG, Jr., who has readily made the drawings and the photograph. \nPreviously the following species of Syrphid flies had been recorded from the Karakorum-region (SACK 1935):

Description: In 1883 J. M. F. Bigot described Speghina? macropoda after one female from "Birmania". Bigot used to place a question mark after the generic name when he was not sure that the described species did belong to the genus in question. The not forwardly produced oral margin, the presence of a facial tubercle, the spinose hind femora, and the wing-venation created a doubt about the correct use of the name Sphegina. He thought macropoda might need a new genus.\nDe Meijere (1908) erected the new genus Spheginobaccha with Sphegina macropoda Bigot as type-species. He recorded one \xe2\x99\x82 and one \xe2\x99\x80 from Semarang, Java. He described both specimens and figured the wing. Though in many respects his female answered to Bigot\'s description of the female, De Meijere found also minor differences.\nBrunetti (1923) recorded S. macropoda (Bigot) from India on the score of Bigot\'s specimen from Burma, but he did not know the species. The given description of macropoda is a compilation from that by Bigot and that by De Meijere.\nHowever, in the same work Brunetti (p. 120) recorded six males and four females, and figured the male abdomen, of his Baccha robusta. According to Herv\xc3\xa9-Bazin (1923) this should be the same as S. macropoda (Bigot).\nThis may be right as Brunetti\'s description of Baccha robusta does not contain anything contrary to that of Bigot. It is strange, however, that Brunetti did not mention the spinose hind-femora and the curious venation of the wings.\nFinally, Hull (1937) described Spheginobaccha melancholia after two females from Cochin-China.

Description: Aulacocyclus laevipennis nov. spec. \nDescription. Lamellae of antennae rather short and stout. Labrum about twice as broad as long, with long, dark red hairs, strongly and closely punctured, anterior margin concave, angles rounded, sides slightly convergent behind. No groove between clypeus and frons. Central tubercle very robust, somewhat square in section, seen from the side its basal vertical part as broad as the whole hind half of the head, strongly elevated and regularly bent forward, excavated in front, seen from behind the base is a little narrower than the apex, the latter a little excavated. Surface of head and basal sides of central tubercle with coarse, hair-bearing punctures. Supra-orbital ridges straight, parallel, somewhat thickened in front. Mentum with a small, smooth, triangular central part, the rest coarsely punctured with dark red hairs. Mandibles with 3 terminal teeth, anterior lower tooth of the right mandible conical, pointed, that of the left mandible very broad, at the outer side with 3 teeth, at the inner side deeply excavated. \nThe angles of pronotum prominent and rounded. The median groove is deep but incomplete in front. The marginal grooves are narrow, scarcely punctured, the anterior marginal groove moderately broader and deeper behind the head. Scars are smooth, small and oval. Anterior part of scutellum coarsely punctured. \nElytrae smooth, glossy, only the grooves near the suture distinct, the other grooves towards the sides become more and more indistinct, the lateral grooves have disappeared and are only recognizable by the vaulting of the ribs and the rows of small, obscure punctures. Epipleurae densely

Description: The family of Syrphid flies (\xe2\x80\x9cHover flies\xe2\x80\x9d or \xe2\x80\x9cFlower flies\xe2\x80\x9d) is richly represented in the Neotropical region. FLUKE\xe2\x80\x99S Catalogue of Neotropical Syrphidae, finished in September 1953, records 107 genera and 1,507 species, exclusive of 100 \xe2\x80\x9cspecies incertae sedis.\xe2\x80\x9d (In actual fact, 1,508 species are enumerated, but Baccha picta Wiedemann (FLUKE, p. 259) is an Ethiopian species.) The large genera Volucella with 274 species, Baccha with 269 species, Mesograpta with 130 species, and Eristalis with 106 species, seem to have had their greatest opportunity of development in this region. However, some of the names will probably prove to be synonyms, since the descriptions by earlier authors are often too short and insufficient to enable a species to be recognized with certainty. As a rule, the species described by recent authors are quite recognizable. \nUp to a few years ago the number of Syrphids described or known from Suriname was very small. Moreover, one of them, Volucella ardua Wiedemann, proved to be synonymous with Volucella tympanitis Fabricius, as stated by CURRAN, who studied WIEDEMANN\xe2\x80\x99S type specimens. Of course, the number of the species taken on occasion in Suriname is somewhat larger; but, as far as is known, no enumeration has ever been published.

Description: Having terminated his term of office as a Director of the Suriname Museum at Paramaribo, Dr. D. C. GEIJSKES returned to Holland. Accompanied by Mrs. GEIJSKES he availed himself of the opportunity to make a collecting-trip to several islands of the Windward Group of the Lesser Antilles, situated in a curved line between Trinidad and Puerto Rico. The islands of Grenada, Barbados, St. Vincent, St. Lucia, Martinique, Dominica, Guadeloupe, Antigua, Barbuda, Montserrat, St. Kitts, St. Eustatius, St. Martin, Saba and Anguilla were visited in succession. \nThough Dr. GEIJSKES himself is especially interested in Odonata and aquatic Neuroptera, he and Mrs. GEIJSKES have been kind enough to catch also the Syrphidae they came across. In total 170 Syrphid flies were taken representing 13 species. The flies are in very good condition with full data.