130 ORDER COI.EOPTERA. 



Cassididae, 



Genus CASSIDA. 

 Body flattened and depressed : shield or elytra dilated on all sides, concealing the head 

 and body. 



Cassida CLAVATA. Tortoist Bettlc. (Plate xiv, fig. 11.) 



Head, body beneath, legs, and antennse latcous : eyes black : middle of the elytra, with 

 the four angles black or dark brown ; spaces between, together wilh the extended 

 clypeus luleous and translucent. 



Odontota scutkllaris (Oliv.), Hispa scutellaris (Fab.). This insect has, in conjunc- 

 tion with Cectdomyia robinia (Hald.), become so abundant in Eastern Pennsylvania dmlng 

 the last few years, that the foliage of the locust trees is killed towards the end of August,, 

 as if by dry weather. It is nearly one-fourth of an inch long, of a tawny color, and marked 

 along the back with a black line. 



Chiysomelidae. 



6enu» EUMOLPUS. 

 < Head vertical : antennse as long as the body, thickened at the tips' ( Westwcod). 



EuMOLFus aukatcs ( Fab.). 

 Head, thorax, body beneath, and legs brilliant blue-green : elytra golden green. The feet 

 and antennae incline more to black, yet exhibit the coloring described. 

 It inhabits in great abundance the Apocynum androscrmifoMvmy and is found in July and 

 August. 



Gekus CHRYSOMELA. 



Cukysomela philadf.lphiga. ( Plate xiv, fig. 12.) 



Color of the body dark green, oblong, naked. Palpi, legs and antennse rufous : labium 

 hairy. Front and margins of the thorax and elytra cream-color : lines and spots of 

 the elytra, posterior segment of the thorax, and scutel green : inner margin of the 

 elytra traversed by two lines ; marginal line widened towards the scutel ; the proxi- 

 mate line widened also, and both slightly divergent. Lines punctured in rows sur- 

 rounding the entire thickened border. The shoulders of the elytra marked by two 



