288 MEDICAL ENTOMOLOGY 



Black, sometimes reddish brown species. Beard black. 



Palpi blackish. Forehead eight times as long as it is broad, ceylonicus. 



(Ceylon; Malay; Sumatra and Java.) 



THERIOPLECTES. 

 Group XI. 



Species with hairy eyes and tubercle on vertex. 



91. Forehead with two transverse calli. Subcallus bare and 



shining. Abdomen black with white haired bands. . . subcallosus. 



(North India.) 

 Forehead with one callus. Subcallus not bare or shining .... 92 



92. Frontal callus black, club-shaped, with spindle-shaped exten- 



sion. Abdomen black, reddish yellow at sides of first two 

 or three segments. Palpi stout with short apex. Appendix 

 usually present. Legs black and reddish yellow . . . hirtus. 



(North India.) 



Frontal callus small, indistinct. Abdomen blackish, only 

 reddish on second segment. Palpi slender with long acute 

 apex. No appendix to wing ......... 93 



93. Smaller species. Legs black and reddish yellow . . . wyvillei. 



(Naranda, Himalayas, where it bites human beings.) 

 Frontal callus broad, yellow. Abdomen black, reddish yellow 

 at sides. Palpi slender. No appendix to wing. Legs 



yellow aihilulcrulis. 



(Java.) 



Tabantts striatus, Fabr. A medium-sized fly ; antennae yellowish red, 

 darker at their apices ; palpi pale yellow. Frontal callus oblong, not 

 quite touching the eyes in front and receding from them behind ; 

 for a short distance it is not more than a fine line, afterwards broaden- 

 ing out ; the vertical extension often starts from the callus as a broad 

 stripe. Thorax brown with four distinct greyish lines. Abdomen 

 long and slender, reddish to blackish brown in colour. The medium 

 light stripe extends to the sixth segment, and is formed of oblong 

 spots, narrowest at their apices. The lateral light stripes extend to the 

 fourth segment, and there is often an additional spot on the fifth 

 segment. Male with a broad bluish grey band, intersected by a narrower 

 band, running across the eyes ; abdomen markedly pointed, with lateral 

 pale stripes extending to the third segment only. A common species, 

 widely distributed in India. 



Tabanus albimedius, Walker. A large species with a broad abdomen. 

 Antennae reddish, with dark apices ; palpi pale yellow. Frontal callus 

 not quite reaching the eyes, with a narrow linear extension. Thorax 

 reddish with indistinct grey lines. Abdomen reddish brown with a light 

 median stripe extending the whole length ; the area on the first segment 



