UYPOCEIIA. 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 off 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, CEstr. pi. 1. f. 35, BC^ (1815); Meig. ; Mcq. 

 — sahitiferus, Clark, GEstr. Suppl. ; Ciu-t. ! B. E. iii. 146. Nigra, 

 ochraceo-Jib'ta, alis subfuscescentibus, basi et ad costam subflavesceuti- 

 bus, abdomine n'ujro-ldrto Lasi Jlavo-hlHo aplce ochraceo-hirio, pedibus 

 ferriigineis. Long. 4|-5 ; alar. 9-10 liu. 



Bodi/ black, very pubescent, shining, punctured, brighter and more 

 robust in the male than in the female. Ilmd clothed w'dh short ochra- 

 ceoHS 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. Alulae opake-white. Abdomen black in the middle, clothed toith 

 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. ; E. Sp. I. ; Schr. ; Gmel. ; 

 Pz. ; Meig. ; ]\lcq. — Equi, F. E. S. — veterinm, E. S. A. ; Eal. ; Clark. 

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

 testaceo, antennis pedibusqne 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. Anteinice tawny. AVings nearly 

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

 femora and tibiae partly black. 



Not common. (E.) 



HYPOCERA. 



IlypocERA, Latr. ; Mcq. Trineurce, Meig. Trineurides, Zett. Pho- 

 riles, Blanch. 



Mandibidce et maxillce obsoletce. Falpi porrecti, exarticidati. Anienme 

 prope epistoma, articido nno insiyniore et arista. Aim venis anteriori- 



