504 COLEOPTERA. 



their burrows." Hispa (Uroplata) suturalis Fabr. mines the 

 Locust tree, and often proves very destructive in the Middle 

 and Western States. They are flat, the body behind being 

 broad and square, and the elytra are generally ridged and 

 furrowed. 



Cassida aurichalcea Fabr., the yellow Helmet beetle, is hem- 

 ispherical, flattened, so that the edges of the wings are very 

 thin ; and the larva is broad, oval, 

 flattened, and by means of two spines 

 terminating its upturned abdomen, 

 holds its old cast larva skin over its 

 body as a means of protection. Dur- 

 ing the last week in July we have 

 found the larvae in all stages of 

 growth very abundant on the Morn- 

 ing-glory in our garden, eating holes in the leaves. In the 

 young the head and legs are more prominent than in the old. 

 It pupates the last of July and early in August. 



The Chetymorpha cribraria Fabr. (Fig. 496 ; a, pupa) we 

 have found in all its stages on the leaves of the silk-weed late 

 in July and early in August, and in one instance in Salem it 

 occurred in abundance on the leaves of the raspbeny. The 

 larva differs from that of Cassida aurichalcea, not only in its 

 greater size, but the body is thicker and narrower ; the head is 

 freer from the thorax, and the spines are simple, not spinula- 

 ted. The body is yellow and less protected by the cast skin. 

 When about to transform, the larva attaches itself to the leaf 

 by a silken thread, a few segments from the end where the 

 end of the body of the future pupa is situated. 

 It is .45 of an inch long. The pupa is broad 

 and rather flattened, dark and spotted with 

 Fig. 497. yellow and covered with a whitish powder, 



causing the yellow portions to appear more prominently ; along 

 each side of the abdomen is a row of five spines, and there are 

 four spines on the anterior edge of the prothorax ; it is .40 of 

 an inch in length. 



Fig. 497 represents, according to Harris, "the larva, nearly 

 full size, of Galeruca gelatinarice Fabr. or an allied species, 

 found abundantly on Ambrosia elatior, July 30th. They 



