Rev. H. Clark on Dejean's Genus Cocloaiera. 257 



and of cabinets consists of a variety of forms. As at present 

 constituted, it represents simply one of several forms of Galleru- 

 cidse, which can neither be referred, on the one hand, to any of 

 the genera shadowed forth by Adorium, nor, on the other, to 

 the group of insects more immediately related to Adimonia and 

 Galleruca proper. In Dejean's Catalogue it is made to compre- 

 hend six or seven distinct real genera, the species of which are 

 found in North America, South America, Africa, and Asia; 

 while in modern cabinets the limits of the group would appear 

 to be, if possible, more undefined still ; so that the name has be- 

 come a sort of refuge for everything in the neighbourhood which 

 is unknown or which has been uncharacterized. An examination 

 of my material, during my summer holiday, has enabled me to 

 fix with some certainty the limits of the several genera which it 

 has comprised. I need not here analyze the Dejeanian species*: 

 they will be found in the following pages in their natural places. 

 I have been able to trace them all. It may be convenient, how- 

 ever, to prefix a brief synoptical table of the several genera which 

 contain the species, and which are dealt with in this paper. 



List of Genera. 



Antennas robust, short, incrassated; body ovate ... I. Cerochroa. 



Antenna: iucrassated, cylindrical, joints 3, 4, and 5 



being equal; body subeylindrical, subovate II. Alphidia. 



Antennae incrassated, joint 3 being longer tban 4, 



joints 5-11 broadly compressed; body ovate III. Clitena. 



Antennae incrassated, joints 1, 3, 4 being subequal, 



and 9 and 2 minute and equal; body subparallel IV. IIymenesia. 



Antennae incrassated, serrated, joints 3-7 being the 



broadest, joints 3-7 equal in length ; body ovate V. Orthoxia. 



Antennae incrassated in $ , joints 4-7 dilated and 

 compressed, 3rd joint shorter than 4th ; body 

 ovate VI. Pyesia. 



Antennae incrassated in $ , very long, joints gradu- 

 ally diminishing in thickness from 1 to 11 VII. Procalus. 



Antennae robust, filiform, joints 3, 4, and 5 being 



subequal; body robust, subparallel VIII. Pachyto.ma. 



Antennae filiform, robust, joints 1 and 3 equal, and 

 4, 5, 6 equal and somewhat shorter; body short, 

 parallel IX. Sphenoraia. 



Antennae filiform, joints 4 and 5 equal and shorter 

 than 1 and 3 ; body parallel ; thorax much con- 

 stricted at the base X. Dircema. 



Antennae filiform, moderate in length, joints 4 and 5 



subequal; body robust or broadly ovate XI. Monocesta. 



Antennae filiform, moderate in length, third joint 



very long ; body generally broadly ovate XII. Ccelomera. 



Antennae filiform, robust, nearly as long as the body, 



joints 3 and 5-10 nearly equal; body parallel ... XIII. Coraia. 



Antennas filiform, slender, nearly as long as the 



body; body subparallel XIV. Nestinus. 



Ami. § Mag. N. Hist. Ser.3. Vol.xvi. 18 



