\Q PROCEEDINGS OF THE ACADEMY OF 



PsYLLiODES, Latr. 



Easily known hy the 10-jointed antennas, striate elytra with 

 punctate interstices, and the posterior tarsi inserted on the side of 

 the tibia?. The species are very ditlicult to distinguish. P: inter- 

 stitialis and P. convexior^ Lee, appear to me to be identical ; and 

 P. parmcollis^ Lee, seems to me to be P. punctulata, Mels. 



Blepharida, Chevr. 



1. B. rhois (Forst.), Cent. Ins. i. 21. 



This species is carefullj^ described by Mr. Rogers in his paper 

 on Chrrjsomelidse in the Proceedings for 1856 (p. 29). I cannot, 

 however, consider it as belonging to that sub-famil}', and no course 

 remains but to place it as a separate group of Halticini distin- 

 guished by its bifid claws. 



CASSIDIDES. 



The number of species here enumerated is eighteen, of which two 

 are unknown to me ; but several other species have been attributed 

 to Xorth America by the earlier authors, and Mannerheim (Bull. 

 Mosc. 1853) records the European C. nohilis, Linn., as occurring 

 in Russian America. Two species of Mesomphalia have been said 

 to occur on the Mexican boundaxy, but are very doubtful. They 

 are easily recognized by the coloration, which is green with large 

 red blotches. 



The other genera are thus arranged by Boheman, in his mono- 

 graph of the group; to which reference should be made for de- 

 tailed descriptions. 



A. Head pronunent, visible. Porphyraspis. 



B. Head partially prominent, prosternum produced iu front. 



Chelymorplia. 



C. Head concealed, prosternum not produced. 



a Thorax with the margins thickened. Physonota. 

 b. Thorax transverse, angles rounded, margin simple. 



1. Antenna short. Cassida. 



2. Anteunse longer than the thorax. Copiocycla. 



Porphyraspis, Boh. 



P. cyanea (Say), Boh. Mon. i. 97. 



Hemispherical, very coarsely foveolate ; above light blue. 

 Antennie testaceous. L. .20. Southern States. 



