189 INDIANA CAVES AND THEIR FAUNA. 



Head dark red, rather variable in color, vertical triangle black, second 

 fronto-orbital bristle a trifle smaller than the preceding ; antennie dark 

 red, third joint more or less infuscated ; face and mouth parts dark red ; 

 two large vibrissse on each side, one a little longer than the other, a nar- 

 row strip only is bare below the eye, the remainder of the cheek with 

 rather coarse black pubescence ; occiput black above. Thorax black, 

 the roots of wings, halteres and pleural sutures red or yellowish-red ; 

 scutellum and mesopleurse l)are, hypopleurse with a group of four ascend- 

 ing bristles near the upper edge, otherwise bare on the sides except for a 

 little very small scattering black pubescence ; underneath, between the fore 

 and middle coxte, are very numerous bristles. Abdomen black, its tip, 

 the venter, and usually the posterior margin of each segment red. Coxae 

 and femora black, hairy, the latter stout ; trochanters and knees red ; 

 tibiae usually with a considerable red or reddish yellow, especially near 

 the middle ; tarsi almost uniformly brown. No special long bristles on 

 the legs. Wings without spots, slightly yellow, the costal bristles small. 



Length, 5 to 5 5 mm. ; of wing, 4.5 to 5 mm. 



Nine specimens, both sexes: Donnehue's Cave, July 14 (3) ; Shiloh 

 Cave, July 15 (1) ; Porter Cave, (2) ; Mayfield's Cave, July 9 (3). 

 Two of the specimens have numerous mites attached to the body. 



10. Blepharoptera spec us n. sp. 



Cinereous, largely yellow, scutellum pubescent. 



Head yellowish, vertical triangle and upper part of occiput black, 

 second fronto-orbital bristle smaller than first. Antennae far apart, yel- 

 low, third joint somewhat darker, one vibrissa, the small hairs behind it 

 confined to a narrow strip close to the oral cavity. Dorsum of thorax 

 brown, about the edges more yellow; humeri, the posterior part and the 

 scutellum usually entirely yellow, scutellum with distinct black pubes- 

 cence besides the usual bristles. Pleurie yellow with a darker color on 

 the meso and hypopleurae, the former part bare, the latter with one 

 ascending bristle above and almost imperceptible sparse black pubescence, 

 underneath a few bristles ; tegulse and halteres yellow. Abdomen on the 

 basal half quite blackish, overlaid with cinereous dust, toward the tip 

 yellow ; male hypopygiuiu large. Legs principally yellow, but varying 

 in different individuals. In both sexes a row of six or eight bristles in 

 front near the tip of the middle femur ; in male a similarly placed row, 

 but higher up, on the hind femur, numbering four or five. Wings 

 slightly yellow, the costal bristles large. 



Length, 3.5 to 5 mm ; of wing, the same. 



Eighteen specimens, both sexes: Eller's Cave (3); Porter Cave (11); 

 Mayfield's Cave, July 9 (2) ; Donnehue's Cave, July 14 (1) ; Wyandotte 

 Cave (l;. 



The species of Blepharopteraj were the largest and most common Diptera noted 

 in the caves. They were found in the damper portions of nearly every cave vis- 



