3 -I '6 ^ ^ 

 142. 



MEJ.OPHAGUS OVINUS. 



The Sheep-louse. 



Order Omaloptera Leach. Fam. Hippoboscklac Leach. 



Type of the Genus Hippobosca Ovina Linn. 

 Mblophagus Lat., Leach, Olfers. — Melophila Niizsch. — Hippobosca 

 Linn., Fab., S;c. 



Antennce coriaceous, remote, nearly concealed in a cavity before 

 the eyes, subglobose, pubescent, with a few bristles on the in- 

 ternal side, near the margin of the orifice in front, from which 

 arises a membranous flat style divided into four teeth (fig. 3. the 

 antenna 5 a, the style ; a*, the same taken out to show its whole 

 length). 



Labrum horny long slender incurved hollow, receiving the tongue 

 (2 b). 



Tongue as long as the labrum, very slender (2 c) . 

 Lip hollow as long as the labrum, receiving it and the tongue, 

 dilated at the base (2 g, and 4 g) . 



MaxilltB ? rigid pilose, as long as the head, united above at their 



base, somewhat hollow and incurved (4d). 



Head corneous above, coriaceous beneath, with a large cavity on each 



side to receive the anterior mxce (4, underside of head). Eyes narrow 



lateral. Ocelli none. Thorax undivided, with all the legs attached, 



having 2 spiraculcB on each side and being slightly produced where the 



wings arise in the other genera. Wings none. Scutellum nearly 



obsolete. Abdomen large, inflated, coriaceous, semitransparent, 



with 6 spiracles down each side. Legs of equal size, short robust 



pilose. Tibiae spurred. Tarsi b -jointed, 4 first joints transverse, 



5th long. Claws recurved at the base. Pulvilli slender (8, a fore-leg). 



Larva nourished in the abdomen of the mother, and excluded after 



transformation. Lat. 

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

 pressed at one end. Lat. 



OviNUS Linn. Faun. Suec. 1924. 



Covered with rigid hairs. Head proboscis and thorax ferruginous. 

 Abdomen dull yellowish with a heart-shaped spot on each side 

 and a less perfect one forming a triangle near the base ferm- 

 ginous. Legs subochraceous. Tarsi ferruginous. Claws black. 

 Li the Author's and other Cabinets. 



