322 0. Stal, 



,^4. Chrysomela Rogersii Le Conte. 

 Rotuiidata, valde convexa, nigro-cyanea, thoiace minus deuse punctato, 

 subtiliiis in medio, lateribus rotundatis, postice subpavallelis, elytris auran- 

 tiacis, seriatim punctatis, sericbiis per i)aiia approxiniatis, exteinis confusis, 

 macula magna humerali, alterisque pluribus parvis nigris. Long. 32 — 47. 



Doryphora Roqersii Le Conte. Journ. Acad. Philad. New. Ser. 



IV. p. 2G. (1858.) 



Patria: Flatte River, Nebraska, Llano Estacado. 



Related to D. trimaculata, but apart froin tlie markings of the elytia, it differs 

 by the sides of tlie thorax being nearly paiallcl posterioily, so that the base is not 

 at ail narrowed as in that species. The spots on tiie elytra are variable in size, 

 and the two middle ones are sometinies eoulluent. They are placed: on each, two 

 sniall ones near the base, and a large humerai one; tiien two at the middle near the 

 suture, sometinies confluent; then threc, the outer one near the niargin, tlic inner 

 ones usuaily confluent, and about one-third froni the suture and one-third from the 

 tip; finally a small dot near the latéral margin, about one-tifth from the tip: tlie su- 

 ture is dark browii, nearly black. (sec. Le Conte 1. c.) 



^ 5. Chrysomela decemlineata Say. 



Yellow, thorax litterate A\ith black; elytra each with five black Unes. 

 , Doryphora 10-lineata Say. Journ. Acad. Philad. III. p. 453. 1. 



(1824.) 

 „ „ Say. Compl. writ. éd. Le Conte. IL p. 218. 



1. (1859.) 

 ^„ „ Sutïr. Eut. Zeit. XIX. p. 245. sub D. 10- 



liaeata Roger s. (1858.) 

 Inhabits Missouri and Arkansas. 



Body yellow: head with a triangular, black, frontal spot: thorax, two abbre- 

 viated, black, approximate Unes, divergent liefore: about six tdack dots on each side: 

 elytra, suture, and tive Hues on each, black; tiie interior line is confluent with the 

 suture behind; exterior line marginal; tliree interniediate ones joined or approxiraated 

 at tip: l)eneath, incicures and three or four séries of ventral spots black. 



Leugtli two tifths of an inch. 



var. a Elytra white: the two outer interniediate liues are united at base and 

 tip. (sec. Say. 1. c.) 



Interstitium octavum elytroruni iirofuiide puiictatum. (sec. Suffrian. 1. c) 



6. Chrysomela chlorizans Suffr. 

 Subovata, convexa, Isete viridi-purpurasccns, subtus seneo-nigra, anten- 

 iiis nigris, elytris parce punctulato-substriatis, transversini rugulosis. 



