DIPTERA. 101 
Puparium.—Once out of the back the larva rapidly darkens and contracts, and the 
puparium, which is merely the contracted and hardened larva, becomes dark brown, 
almost black, but otherwise possesses all the characteristics of the larva. 
Imago (Fig. 47).—Length, one-half inch (five-eighths with ovipositor extended) ; 
: general color, black; body more or less clothed with yellowish-white, reddish, and 
| brownish-black hairs. The front, sides, and back of the head, the sides of the thorax, 
is 
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Fia. 46.—Hypoderma lineata: diagram of spiny armature. 
a band across the base of the scutellum, and the basal segment of the abdomen are 
covered with long yellowish-white, almost white, hairs. The head above, central 
thoracic region, including prothorax and mesothorax, middle segments of the abdo- 
men above, and legs, clothed with brownish-black hairs, which on the head and thorax 
ure more or less intermixed with whitish hairs. The covering of hairs is shorter and 
Fia. 47.— Hypoderma lineata: female—natural size indicated by side line (from Insect Life). 
scantier on the head and thorax, and the tip of the scutellum and following parts of 
the thorax, together with four prominent lines on the thorax, indicated in the draw- 
ing by the high light, are smooth and highly polished. The hairs of the terminal seg- 
ments of the abdomen are reddish-orange, which color also predominates on the hind 
tibix. 
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