NO. 1938. THE DIPTEROUS FAMILY PHORID.I::—MALLOCH. 417 



25. Abdomen with several transverse rows of very long and strong bristles. 



Xanionoium, p. 510. 

 Abdomen bare Acontistoptera, p. 509. 



26. Wings narrow, strap-like Ecitomyia, p. 508. 



Wings more or less triangiilar and indistinctly veined Commoptera, p. 509. 



27. Body, seen from above, oval, cockroach-like Mnigmatias, p. 511. 



Body, seen from above, of the usual shape, more or less constricted into three 



parts 28. 



28. Ocelli and ocellar bristles present Puliciphora, p. 504. 



Ocelli and ocellar bristles absent Chonocephalus, p. 510. 



DESCRIPTIONS OF SPECIES. 



Genus TRUPHEONEURA' Malloch. 



TABLE OF SPECIES. 



1. Halteres black, or brown 2. 



Halteres yellow 7. 



2. Fork of third vein very long, starting at below tip of first Ye'm. occidentalis, p. 417. 

 Fork of third vein not long, starting much beyond end of first vein 3. 



3. Scutellum with four equal bristles 4. 



Scutellum with two bristles and two small weak hairs 5. 



4. Third vein very thick, thicker on its entire length than costa at tip, legs all piceous. 



pachyneura, p. 418. 

 Third vein not thicker than costa at tip, legs nearly all yellow varipes, p. 419. 



5. Wings limpid, first vein ending much nearer to tip of costa than to humeral vein. 



vitrinervis, p. 419. 



Wings grayish, first vein ending at midway between humeral vein and tip of 



costa 6. 



6. Male palpi of normal size and moderately bristly fratercula, p. 420. 



Male palpi large and very weakly bristled suspecta, p. 420. 



7. Male palpi very large and nearly bare microcephala, p. 421. 



Male palpi normal in size and moderately bristle subfusca, p. 422. 



TRUPHEONEURA OCCIDENTALIS Brues. 



Female. — Black; frons slightly broader than long, polished and un- 

 punctured, post-antennal bristles widely separated, first row scarcely- 

 higher than post-antennals, equidistant and nearly straight, antennae 

 small, rounded, arista strongly pubescent ; palpi slender, bristly to- 

 ward the tips, proboscis short, membranous, four scutellar bristles, 

 the anterior pair weak; second abdominal segment not elongate, sur- 

 face of abdomen sparsely hairy; legs black, trochanters and knees yel- 

 low, anterior tibise without bristles, mid tibiae with the usual two bris- 

 tles, hind tibiae with one bristle just before middle; wings infuscated, 

 especially on anterior half and along course of veins, costa to beyond 

 middle, fringe short, sparse and delicate, costal vein thickened on 

 apical half, first division one-fourth longer than other two together, 

 third as long as second, the fork of third vein originating very far 

 basally, nearer to base of fifth than fourth vein and opposite to tip of 



1 Jour. Nat. Hist. Soc. Glasgow, vol. 1, 1909, p. 27. 

 48702°— Proc.N.M.vol.43— 12 27 



