HYPOCE11A. 275 



Lays its eggs on the lips of horses, which, " at sight of this fly, 

 are always much agitated, tossing their heads about in the air to 

 drive it away ; and, if this does not answer, galloping oft to a dis- 

 tant part of the pasture, and, as their last resource, taking refuge 

 in the water, where the gad-flies never follow them." Not com- 

 mon. (E.) 



3. salutaris? Clark, (Estr. pi. 1. f. 35, 36 (1815); Meig.; Mcq. 

 salutiferus, Clark, (Estr. Suppl.; Curt.! B. E. iii. 146. Nigra, 

 ochraceo-hirta, alis subfuscescentibus, basi et ad costam subflavescenti- 

 bus, abdomine nigro-Mrto basi jiavo-hirto apice ochraceo-hirto, pedibus 

 ferrugineis. Long. 4^-5; alar. 9-10 lin. 



Body black, very pubescent, shining, punctured, brighter and more 

 robust in the male than in the female. Head clothed with short ochra- 

 ceous hair. Eyes dull castaneous. Thorax covered with orange down, 

 having at the base of each wing an orange spot, which is more distinct 

 in the male than in the female. Wings slightly brown, yellowish-brown 

 at the base and along the fore border ; costal vein brown ; the others 

 paler. Alula? opake-white. Abdomen black in the middle, clothed with 

 pale-yellow hairs towards the base, and with orange hairs at the tip. 

 Legs reddish-brown, clothed with paler down. 



Not common. (E.) The fly here described seems hardly dis- 

 tinct from the preceding species. 



4. nasalis, L. Fn. 1732 (1761) ; D. G. ; F. Sp. I. ; Schr. ; Gmel. ; 

 Pz. ; Meig. ; Mcq. Egui, F. E. S.veterinus, F. S. A. ; Fal. ; Clark. 

 Clarkii, Lea. ; Meig. Nigro-fusca, fulvo-hirta, capite fulvo subtus 

 testaceo, antennis pedib usque fulvis, alis sublimpidis, abdomine cano- 

 hirto, femoribus tibiisque ad partem nigris. Long. 4 ; alar. 8 lin. 



Body blackish-brown. Head and thorax clothed with tawny hairs. 

 Head tawny, testaceous beneath. Antennae tawny. Wings nearly 

 limpid ; veins tawny. Abdomen clothed with hoary hairs. Legs tawny ; 

 femora and tibiee partly black. 



Not common. (E.) 



HYPOCERA. 



HYPOCERA, Latr. ; Mcq. Trineura, Meig. Trineurides, Zett. Pho- 

 rites, Blanch. 



Mandibulce et maxillae obsolete. Palpi porrecti, exarticulati. Antennae 

 prope epistoma, articulo uno insigniore et arista. Alee venis anteriori- 



