OF NEW ENGLAND. 137 



Seen from below, in its general outline, the insect is 

 long, narrow, elliptical ovate. The head is ovate, being 

 longer than broad, and narrowing in front of the eyes ; the 

 vertex is very high and convex ; eyes remote, the interme- 

 diate space broad and curvilinearly ridged just within the 

 eyes ; between the insertion of the antennae and the eyes 

 is a broad space ; the antennae are inserted near the ante- 

 rior fourth of the front of the head ; they are elbowed at 

 the end of the second joint, which projects at a right angle 

 beyond the head, thence they are folded upon the ster- 

 num, converging slightly, and their very acute tips reach 

 to just before the coxas of the second pair of legs. All 

 the three pairs of coxa? are visible. The forelegs termi- 

 nate at the second pair of coxas. The ovipositor seems as 

 if a continuation of the mesial ridge, and is nearly one- 

 third the length of the entire abdomen. 



Larva. Body short and thick, t fourteen jointed, cylin- 

 drical, both extremities much alike ; the larva assumes a 

 lunate form, the head being inclined towards the tip of the 

 abdomen, which is likewise incurved : the head is conco- 

 lorous with the rest of the body, which is pale, pearly 

 white ; the rings are slightly convex, with no lateral raised 

 line ; terminal anal segment orbicular and rathe r large. 

 Length, .04 inch, being one-third as broad as long. 



PTEBATOMUS* nov. gen. 



This genus will be easily distinguished from Anagrus, 

 to which it is nearest related, by the obtusely conical 

 abdomen and the narrower linear wings. The generic 

 characters laid down by authors are so scanty that the 

 comparison with other genera of this group cannot be car- 

 ried farther. In the figure, a side view of the insect is giv- 

 en, and the following description is made from the insect in 

 that position. Owing to its minute size the single speci- 

 men was unfortunately lost from the glass slide before a 

 complete description could be prepared. Hence I am 

 unable to state the number of tarsal joints, or the exact 



* From the Greek ptcron, a wing, and atomos, an atom. 

 ESSEX INST. PROCEED. VOL. IV. R. 



