May, 1910. Notes ox Some CLERiDi* — Wolcott. 383 



of the thorax are wanting and are represented by a mere stain which 

 is, however, coalescent at the middle; the smaller specimen has the 

 spots each side distinct and well separated. The ground color of the 

 elytra is black, with a very slight bluish tinge. 



Cregya LeConte. 



Cregya Lee, Class. Col. N. Amer., 1S61, p. 197; Lee, Smiths. 

 Misc. Coll., VI, 1865, p. 98; Gorh., Trans. Ent. Soc. Lond., i, 

 1877, p. 417- 



The generic name Pelonium Spinola (Mon. Cl^r., i. 1844, p. 347) 

 must, much as the writer regrets the fact, be abandoned in favor of 

 the more recently proposed term Cregya. Spinola hax-ing failed to 

 designate a type for Pelonium, Rev. Gorham in 1877 (1. c, p. 417) 

 selected and fixed the type, choosing Forster's Lampyris pilosa, but 

 this species is a true Chariessa, consequently the name Pelonium 

 becomes a synonym of that genus which has fourteen years priority. 



The characters usually given for the separation of the genera, 

 Chariessa and Pelonium, are as follows: 



Body short, convex; sides of prothorax rounded, Chariessa. 



Body longer, less strongly convex ; sides of prothorax posteriorly 



angulately enlarged Pelonium. 



In Chariessa pilosa and the other species 01 the genus 01 the region 

 north of Mexico the prothorax is somewhat broader posteriorly as, 

 indeed, is true of the type of Chariessa {ramicornis Petty), but the 

 sides are rounded and neither angulate nor constricted before base. 

 The form of body is valueless in separating the two genera ; starting 

 vfiih. ramicornis, in which the form is very short and broad, the 

 species grade through vestita, elegans, dichroa, and pilosa to the elon- 

 gate texana so gradually that it is impossible to draw a line of de- 

 marcation. 



To the genus Cregya may be referred all those species having the 

 lateral flanks angulate and constricted, this being apparently the sole 

 character which distinguishes them from the species of Chariessa. 

 The outer margin of the anterior tibiae may be either smooth, irregular, 

 or serrate, this character varying within specific limits. 



The species occurring in America north of Mexico may be differ- 

 entiated as follows: 



