1917] Fossil Insects 21 



long and slender, with minute short hairs; hind coxag longer than head; 

 abdomen elongated. 



The wings are crumpled, so that it is impossible to get exact measure- 

 ments, and the figure given, though approximately correct, must be 

 regarded as diagrammatic. The complete subcosta is an archaic 

 character, and might suggest a distinct genus, but the living 5. lugens 

 Johannsen, as figured, is not very different. 



In Burmese amber (Burmite) ; received from Mr. R. C. J. Swinhoe. 



Trichomyia swinhoei n. sp. (Psychodidas). 

 (Fig. 4, A, wing; B, head and thorax; C, end of abdomen). 



Male. Length about 1600 microns, wing about 1410 microns long 

 and 560 broad. Dark brown or black, the wings clear hyaline. Antennae 

 long and slender, apparently 16-jointed, the joints beyond the second 

 long and slender, hairy; palpi of moderate length; legs slender; wings 

 with marginal fringes, and long hairs on the veins, venation as shown in 

 figure. The thorax, in lateral profile, is produced anteriorly above, 

 angular; the scutellum is prominent. Unfortunately the anal field 

 of the wings cannot be seen, but the insect certainly appears to belong 

 to Trichomyia, not to Sycorax. 



In Burmese amber, received from Mr. R. C. J. Swinhoe. It is 

 in the same piece of amber as Sciara burmitina. The genus Trichomyia 

 appears to be on the wane. Meunier describes no less than eight 

 species from Baltic amber (Oligocene), but Brunetti does not report 

 the genus at all in his account of the Psychodidce of India. In North 

 America we have only a single species listed in Aldrich's catalogue, 

 and that is Mexican. 



Anthomyia (s. lat.) laminarum n. sp. ( Anthomyiidas) . 

 Female. Length 6 mm., thickset (form nearly as in Spilogaster), 

 black; wings about 4 mm. long, broad, hyaline, costa with short black 

 bristles, costal margin conspicuously elevated and convex before end 

 of auxiliary vein; head shaped (in lateral profile) much as in Williston, 

 N. Am. Diptera, 3rd edition, p. 335, fig. 27, the top of head broad, 

 and with only very delicate bristles, though the front has conspicuous 

 bristles; dorsum of thorax, anterior to wings, with no long bristles, 

 but there are long bristles at level of wings, the whole arrangement 

 here apparently as in Lis pa; abdomen stout, bristly, with a distinct 

 short ovipositor ; the depth of abdomen (doubtless increased by pressure) 

 is 2.3 mm. The venation is much as in Williston's figure of Choristoma. 

 Auxiliary vein complete, but pale; first vein ending soon after auxiliary 

 (a deceptive appearance of its continuing parallel with the margin 

 is due to the lower ed^e of the thick costa) ; anterior cross-vein about 

 middle of discal cell, being 1040 microns from apex and about 1024 

 from base; first posterior cell not contracted at apex; width (depth) 

 of submarginal and first posterior cells at vertical level of end of second 

 vein each about 432 microns; superior apical angle of discal cell prac- 

 tically a right angle; apex of third posterior cell (angle between fifth 

 vein and lower margin of wing) very acute. 



