XII, D, 3 Bezzi: Studies in Philippine Diptera, II 109 



spots are not in contact with the wing margin, but are placed at 

 a little distance from it; the other spots are distributed as in 

 guttifer. Neuration the same as in guttifer. Body brownish 

 black, without distinct pattern. Legs dark brown, with the 

 knees and the tips of tibiae and tarsi whitish yellow. Antennae 

 short and blackish, 



Luzon, Rizal, Alabang (Mitzmain). Mr. Mitzmain has used 

 this gnat in experiments on the transmission of surra. 



104. Pselliophora suspirans 0. S. 1882. 



Mount Maquiling. An endemic species. The present speci- 

 mens differ from Osten Sacken's description in having a rounded 

 yellowish spot between the middle and hind coxae, of which the 

 author does not speak; the collar shows a grayish spot in the 

 middle ; the wings show a trace of a yellowish tinge at base. 



Key to the Philippine species of the genus Pselliophora Osten Sacken. 



The genus Pselliophora seems to be rich in endemic Philippine 

 species, some of which are very beautiful insects and are similar 

 in general facies and coloration to some endemic species of the 

 genus Eriocera. They may be distinguished as follows : 



a*. Tibiffi with a white basal ring; fourth posterior cell rather long, not 

 much broader at base than at tip. 

 fe\ Wings uniform black or blackish; head brown; thorax entirely 



black dolens 0. S. 



6^ Wings brown, with a white spot in the middle. 

 c\ Scutellum black. 



d\ Collar entirely black or with only a grayish middle spot; femora 

 black at base; abdomen with a single yellow band. 



suspirans 0. S. 

 d'. Collar with a broad white spot in the middle; femora broadly 

 yellow at base, at least those of the hind pair in the female; 

 third and fourth abdominal segments with yellow spots. 



suspirans hilaris var. nov. 

 c'. Scutellum yellow; femora with yellow base; abdomen with segments 



2 to 4 reddish yellow; genitalia black idalia 0. S. 



a'. Tibiae without white basal rings; wings uniformly blackish, with the 

 fourth posterior cell short, twice as broad at base as at end; species 

 of greater size. 



e\ Thorax and legs entirely black praefica sp. nov. 



e^ Thorax and legs partly orange-yellow. tripudians sp. nov. 



105. Pselliophora suspirans hilaris var. nov. 



Very like P. suspirans, but distinguished by the more whitish 

 than yellowish thoracic markings and by the more extended, 

 whitish abdominal pattern. 



Male and female. — Length of body, 12 to 13 millimeters; of 

 wing, 12 to 13. Rostrum without brown spot in front. Collar 



