110 S. S. Haldeman on new Insects. 
fully as wide as the thorax, but longer, basal segment composing 
3 of the whole, besides which there are 4 small segments (?): 
OVipositor not exserted. Feet ($2) slender elongate, pentame- 
rous, posterior femora incrassated, anterior tibiae with an inferior 
apical bifid spine curved beneath the basal artic. of the tarsus, 
which is concave beneath, oe armed with a dense pectiniform 
series of bristles as in Cinetus. 
e chief sexual Avec is that (in addition to the scapus) 
in che! g@ the 2d and 4th articulations of the antenne are incras- 
sated, and in the 2 only the 2d, which is moreover one of the 
longest i in the @ and one of the shortest in the &. Their cloth- 
ing is also distinct, being long, rigid, and curved forward in the 2, 
and short and straight in the g. The antenne have no pedi- 
cellus, a from their translucency at the joints, the round 
e 2d articulation moving in the first, bears some re- 
saint: to one 
The want of palpi zand the ciliate wings would place this genus 
in Mr. Westwood’s subfamily Mymarides, the wings however, 
are not narrowed, and there is no vestige of a nervure, so that I 
prefer considering it as a distinct type under the name Amitides. 
The name, from «, wero: (a thread,) is in allusion to the absence 
of naan 
A. ateuropinus. Polished back, eae with minute white — 
hairs; a transverse impression above t mouth ; antenne rufous, 
apex brownish ; anterior teet and all the trochanters and tarsi, pale 
rufous ; posterior tarsi, the final joint of the others, and the base 
of the anterior femora, discolored. # millim. long, or 1} to the 
end of the wings in repose. 
Parasitic in the larva of Aleurodes corni, Hald., of which it 
destroys a great many. I found it with that insect beneath the 
leaves of Cornus sericea, on the margin of a water course. It 
leaps, walks and flies with facility, and when touched, simulates 
death. The antenne are kept in a constant state of vibration. 
I have kept them a week or more, living in confinement. The 
ova (crushed from the ovaries) are fusiform, rounded at one eXx- 
tremity and produced at the other like the neck of a flask. 
T'wo mutilated specimens of another species of parasite were 
raised with ie preceding and imperfectly examined. The color 
is pale flavous; the wings have a subcostal nerve not quite 
straight, ending in a short stigmal branch about the middle, the 
wings in all other respects as in Amitus; feet slender and ap- 
parently pentamerous ; eyes black, covered with numerous short 
erect bristles, more distinct than in Chelonus : head, thorax and 
abdomen closely united, thorax large, abdomen with the ‘pide 
parallel and the apex obtusely rounded, in one specimen (¢ ) the 
abdomen seems but half the width. of the thorax, and in the 
other its sides form straight lines with it; antennae (see omnes 
—— oe oe 
é 
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