298 INSECTA. 
tremity, and exhibits externally but four annuli. The antenne are 
as long as the head or nearly so, and terminated by a joint longer 
than the penultimate. 
Certain species, forming a particular section, in their larva state 
inhabit the body of various caterpillars which they destroy(1). 
We now pass to Creophilz in which the seta of the antennz is 
evidently pilose or plumous. Their third joint always forms an 
elongated palette, longer than the preceding one. 
F Dexia, Meig. 
The Dexiz have the general appearance of the Ocypterz, their 
abdomen being narrow and elongated, particularly in the males(2). 
Musca, Lin. Fab. Meig.—Mesembrina, Meig. 
In Musca, properly so called, or the true Fly, the abdomen is 
triangular, and the eyes are contiguous posteriorly, or closely ap- 
proximated in the males. 
Here come most of those Flies whose larve feed on carrion, meat, 
&c.; others of the same subgenus inhabit dung. They all resemble 
soft, whitish worms without feet, thickest and truncated at the 
posterior extremity, and becoming gradually smaller towards the 
opposite one, which terminates in a point furnished with two hooks, 
with which they divide their aliment, and accelerate its decomposi- 
tion. The metamorphosis of these Insects is effected in a few days. 
The posterior extremity of the abdomen of the females is narrowed 
and prolonged in the manner of a tube or ovipositor, by which she 
can insert her eggs. 
IM. vomitoria, L.; Roes., Insect., II, Musc., et Cul., ix, x. 
A large species; front fulyous; thorax black; abdomen glossy- 
blue with black streaks. 
This Insect enjoys the sense of smell to a high degree, an- 
nounces its presence in our dwellings by a loud humming, and 
deposits its ova on meat. Deceived by the cadaverous odour 
arising from the Arum dracunculus, L., when in flower, it also 
(1) This genus also is in great confusion in the work of Meigen, and consists of 
species with very different antenne and wings, as is evident from his figures. 
We have removed the Echinomyiz and the Melanophore; until the work of Dr 
Desvoidy is published we will leave the other species in the genus Zuchina. 
(2) See Meigen. : 
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