Dec, I9I2.] Fall: North American Collops. 255 



Legs bicolored, abdomen red in the (^, maculate in the 5. 

 elytra more densely punctured, dull or feebly shining. 



feinoratus. 



Legs black, abdomen heavily maculate with black in both 



sexes, elytra less densely punctured and moderately 



shining 4-maculatus. 



Prothorax with discal black spot (lacking in texamis). 



Elytra densely rather coarsely punctate, prothorax polished, elytral spots 

 very large, separated by a rather narrow transverse subparallel fascia ; 



size large balteatus. 



Elytra finely not very closely punctate, prothorax alutaceous and dull 

 throughout, size small. 

 Sides of the prothorax rather broadly pale., .punctulatiis var. insulatus. 



Prothorax entirely black pnnctulatus var. utahensis. 



Prothorax entirely pale punctulalus var. texanus. 



Prothorax black, varying to maculate or entirely rufous, elytra each with a basal 

 and subapical spot (typical), these uniting in some specimens to form a lon- 

 gitudinal vitta narrowed at about the middle. Basal joint of antennae in the 

 (^ sinuate posteriorly, second joint strongly transverse ; elytral punctuation 

 fine and not very close, legs black in large part, the tarsi and sometimes the 

 front and middle tibias pale versatilis. 



C. cribrosus Lee. Proc. Acad. Nat. Sci. Phila., 1852, p. 164. 



Head black, the labrum, epistoma and the anterior portion of the front pale. 

 Antennse pale throughout in the (^, the outer joints more or less infuscate in 

 some 5$; basal joint distinctly impressed or sinuate on its posterior face, sub- 

 rectangular and about one half longer than wide as viewed from the front. 

 Prothorax black with very narrow pale lateral edge in the typical form, varying 

 through rufous with a central black spot (rarely divided) to entirely red; sur- 

 face polished and finely sparsely punctate. Elytra dark blue or green, shining, 

 closely and coarsely punctate. Front legs pale, middle ones variable, hind ones 

 black. Length 3-4 mm. 



This is one of the most easily recognized of all our species because 

 of the oval elytra, narrow at base and without humeri. In all the 

 specimens that I have seen the wings appear to be completely want- 

 ing, in which respect it may be distinguished from all our other 

 species except criisoc. The statement by Dr. Horn that some speci- 

 mens have well developed wings and that the transition is gradual 

 through others with imperfectly developed wings to those with none 

 at all, I have for some time looked upon with suspicion. Horn 

 expressly states that the better developed specimens are from the salt 

 marshes of the Owens V^alley, and to settle the question, Dr. Skinner 

 has at my request kindly sent me for examination the greater part of 



