218 



GUIDE TO CALIFORNIA INSECTS. 



first with rows of punctures, and the epiplurge of the last narrow. Diacus: 

 claAvs simple. Cryptocephalus: prothorax margined. 



Trirhabda: antennae on front between the eyes and claws simple, cleft or 

 acutely toothed. Diabrotica: front carinate. Galeruca and Monoxia: epi- 

 pleurse extending to sutural angle, the last with front narrow. 



Luperodes: antennae on front between the eyes. Phyllobrotica: elytra witli- 

 out epipleurge. Androlyperus: last joint of maxillary palpi not conical. Scel- 

 olyperuis: epipleuras narrow. 



Criocerus: prothorax not margined. Xanthonia and Adoxus': front cox^ 

 distinctly separated, the first with prosternal sutures obsolete. Donacia: 



Figure 196. Work of Adoxus ob-scui-us. 

 first ventral segment very long. Zeugophora: eyes emarginate. Syneta: 

 prothorax toothed at the sides. Tricolema: prothorax subangulate at sides. 

 Orsodachna: prothorax son'cwhat bell-shaped. Lema: prothorax constricted 

 at middle. 



Glyptoscelis: front not inflexed. Metachroma, Colaspidia and Colaspis: an- 

 terior margin of prothorax straight beneath, the last without supraorbital lines 

 on head, the first with body glabrous. Paria and Chrysochus: body glabrous, 

 the first with hind tibise toothed towards the tip. Myochrous: sides of pro- 

 thorax toothed. 



Cassida. M icrorhopala, Odontata and Stenopodius: head free, the last with 

 third joint of tarsi narrow, the first with antennaa apparently nine-jointed. 

 Coptocycia: iintennae extending beyond base of prothorax. 



