TUAXSACTID.NS IIUKTICI I.TL KAL SOCIKTV OF NUUTIIEKN ILL. 361 



also Striped with yellowish white bands ; length five-eights of an inch ; 

 width one-sixth. The perfect insect appears in the latter part of sum- 

 mer and commencement of the fall. The larvae, which are hatched out 

 in the fall, depredate upon the locust {R. pscudacacia), eating the sap- 

 ^yood and perforating the trunk. I have before me now a grub taken 

 from a locust standing in the street. It is scarcely half-grown, as they do 

 not finish their larval state until the next season after hatching out. It is 

 a rather slender grub, with a reddish brown head, having a triangular 

 depression in front and a central scallop behind, the skin of the segment 

 rolling loosely ove;- these posterior margins. It is of a pale yellow color, 

 with six very minute feet. 



Clytus caprace, Say. 



Dark brownish purple, head and thorax darkest ; head blunt with 

 two white lines down the front ; eyes nearly circular, behind them a nar- 

 row yellow border; thorax barrel-shaped, deep purple, surrounded by 

 three very narrow yellow lines, one at each end and one in the middle ; 

 scutel yellow ; wing-cases crossed by three yellow bands — first, a semi- 

 circular band from the scutel running backwards and round up to each 

 shoulder ; then another, of similar shape, about the middle, with the 

 circle reversed; then a straiglu band, and a strong spine at the tip of 

 each ; length half an inch ; width one-seventh of an inch. This is quite 

 common in Southern Illinois. 



The larva of this species bores in the ash. 



JEgeria cxitiosa. Say. ' Peach-tree Borer. 



This borer is very different in character from those we have been- 

 considering, as it has sixteen legs — three jointed or true legs on the first 

 three segments, four pairs of abdominal legs on the sixth and ninth 

 segments, and one pair on the last segment. 



It is a naked, soft, white, cylindrical grub, slightly flattened on the 

 under side, and, when full grown, measures something over half an inch 

 long. Its head is a shining yellowish red color, marked in front with 

 black, and at the base and middle with white ; the throat is also white. 

 There are a few scattered brownish hairs on the head and other segments. 

 The prolegs are very short, scarcely protruding below the general surface. 



When fully grown, it spins for itself a cocoon or follicle of silk 

 mixed with the gum and excrement, wherein it passes the pupa state. 

 This follicle is of a brown color, oval in form, with the ends rounded, 

 and is about three-fourths of an inch long, or a little less, and about 

 one-third as broad. 



The perfect insect is a very pretty moth, the male and female 

 differing so materially that they would be taken for different species. 

 They are from one-half to three-fourths an inch long ; expanse, three- 

 fourths to one-fourth in( h. The male is the smaller; the body is a 

 bright, deep steel-blue, sometimes with a yellowish band on the abdomen ; 

 wings yellowish white, semi-transj^arent, with a narrow bordering of blue. 



