421. 



HIPPOBOSCA EQUINA. 



The Forest-fly. 



Order Omaloptera. Fam. Hippoboscidae. 



Type of the Genus, Hippobosca equina Linn. 

 HiPPOBOSCA Linn., Fab., Lot., Meig., Curt., ^c. 



Antennw remote, short, naked, inserted in cavities between the 

 eyes at the fore part of the face (fig. 4, 3), formed of a large 

 ovate fleshy joint, from the apex of which arise one long and 2 

 short bristles (3). 



Labrum horny, hollow, slender, dilated at the base and slightly 

 curved (2 b). 



Tongue nearly as long as the labrum, very slender and transpa- 

 rent, lanceolate at the extremity, apparently with a nerve or 

 canal down the middle (c). 



Maxilla? inclosing the trophi, projecting beyond the head like a 

 beak, bilobed and pilose (4* d). 



Labium a horny hollow curved sheath, inclosing the tongue and 

 labrum (g). 

 Head small, orbicular, strongly and closely united to the thorax: eyes 

 large long and oval (4) .• ocelli none. Thorax large and orbicular, 

 with a transverse suture : scutellum transverse semi-oval. Abdomen 

 coriaceous, globose, and larger than the thorax before the exclusion 

 of the pupa, shrivelled and semiorbicular afterwards, the anterior 

 angles produced and. obtuse. Wings ample, parallel and incumbent, 

 rounded at the apex and furnished with many strong nervures at the 

 base and costa. Halteres concealed in the females, minute and capi- 

 tate (10). Legs rather short and stout, anterior pair placed close 

 to the head, middle pair very remote at their insertion. Thighs, 

 anterior the shortest and stoutest. Tibiae simple. Tarsi 5-jointed, 

 basal joint longer than the Z following which are transverse, 5 th large 

 ovate. Claws large sharp, hooked and recurved at the base. Pul- 

 villi small and bilobed (8, afore leg). 

 Larva nourished in the abdomen of the mother and excluded after be- 

 coming a pupa. 

 Pupa inclosed in the indurated skin of the larva, suborhicularly im- 

 pressed at one end. (fig. A). 



Equina Linn. Faun. Suec. 471. 1921. — Reaum. v. 6. tab. 48. — Curl. 

 Guide, Gen. 1353. 1. 



Ochraceous, shining pilose ; rostrum, eyes and an oblong spot on 

 the crown of the head piceous ; disc of thorax black, elongated 

 to the anterior margin, with a pale yellow curved stripe on each 

 side : metathorax variegated with black and ferruginous, a large 

 spot on the postscutellum and a smaller one above it pale yellow : 

 abdomen dull, the sides rough with short hairs. Wings yellowish 

 fuscous, nervures reddish brown : tips of hinder thighs and tibiae 

 and the base of the latter brown. Claws black. 

 In the Author's and other Cabinets. 



