Mar., 1908.] LENG I NOTES ON COCCINELLID^E. 39 



arcuately sublaminate externally ; claws strongly toothed, almost bifid ; minutely 

 punctulate, more distinctly toward the margins of the elytra which are evenly declivous 

 to the edge, with a very fine marginal bead. 



Length. — 3.7 to 3.9 mm. = . 15 to . 16 inch. 



Habitat. — Arizona. 



Looks at first sight like a small Axion but the body beneath is not 

 excavated as in that genus. Easily known by the uniform testaceous 

 color beneath and by the peculiar dilation of the front tibiae. I 

 regret that I have not seen males and am unable to give the sexual 

 characters. 



Subgenus EXOCHOMUS Redt. 



By the removal of arizonicus and of the species with compara- 

 tively simple claws this subgenus becomes mere compact. All the 

 species are small, rounded and convex, though never subcompressed 

 as in preceding species, with toothed claws, simple tibiae and variously 

 decorated elytra. The forms differing only in pattern or extent of 

 elytral marking are here treated as varieties. 



Synopsis of Species. 



Claws strongly toothed. 



Males with front of head and front angles of thorax pale tnaiginipennis. 



Males with head and thorax entirely dark californicus. 



Claws feebly toothed at base. 



Males with front of head slightly pale ; thorax entirely dark ./asciatus. 



The females of the first species usually have the front angles of the thorax nubil- 

 ously pale. 



Exochomus marginipennis LeC. 



Broadly oval, convex ; head and pronotum black in female or partly pale in male, 

 elytra pale with black markings ; glabrous above and shining. Beneath black except 

 the epipleurce and in the male part of the legs ; claws strongly toothed at base ; tibiae 

 simple , coxal plates of the first ventral segment complete, semicircular, distant from 

 the edge of the segment. Males with fifth ventral segment truncate disclosing a 

 small sixth segment. 



Length. — 2.5 to 3.0 mm. = . 10 to .12 inch. 



Habitat. — South and west from New York ; not known to occur in New England 

 or Canada. 



This species varies in elytral markings and the following varieties 

 have been described : 



Var. childreni Muls. 



Elytra each with one subapical black spot, rarely missing. 

 Occurs in Fla., La., Tex., Mo., So. Cal. 



