ClCINDELID^E AND CARABID/E 4! 



CARABID^. 



Omophron Latr. 



The species of this genus are evidently more abundant and di- 

 versified in North America than in the palaearctic fauna and new 

 forms are continually being brought to light; the following is allied 

 to americanum but is obviously different: 



Omophron fontinale n. sp. Coloration throughout almost exactly as 

 in americanum; body more broadly oval and less elongate; head nearly 

 similar; prothorax a little shorter and more transverse, the sides more 

 converging from base to apex and more arcuate, the punctures similarly 

 aggregated toward apex and base but smaller and less close; elytra with 

 the striae fine but strong, the punctures fine, moderately close-set, 

 becoming widely separated in the lateral striae; intervals nearly flat, 

 becoming moderately convex toward the sides; basal joint of the hind 

 tarsi much longer than the next two combined. Length 5.5-5.7 mm.; 

 width 3.4-3.6 mm. New Mexico (Jemez Springs), Woodgate. 



The shorter, more oval outline of the body and the very much 

 finer elytral striae and punctures, with flatter intervals, cause this 

 species to present a very different facies from americanum, in spite 

 of the general similarity in coloration. 



Omophron iridescens n. sp. Similar in coloration to americanum but 

 rather narrower, more oval and with a slightly smaller head, on which the 

 pale chevron is broader and with the converging sides straight and not 

 arcuate, as they are in that species, the punctures smaller and sparser; 

 prothorax similar but with the punctures toward apex and base less 

 coarse and not so numerous; elytra with similarly deeply impressed but 

 more approximate and relatively still more coarsely punctate striae; 

 tarsi very slender, the basal joint of the posterior in the male unusually 

 short, not longer than the next two combined. Length (cf) 5.4 mm.; 

 width 3.0 mm. Mississippi (Vicksburg). 



The black areas have more of a greenish metallic lustre than in 

 americanum and the deep elytral striae are still more approximate; 

 by anteriorly oblique light the elytral surface becomes slightly 

 iridescent. In americanum the basal joint of the hind tarsi is very 

 much longer than the next two combined. 



Omophron frater n. sp. Oblong-oval in form, convex, shining, pale 

 yellowish, the dark spots slightly exceeding the pale in area on the elytra 

 and metallic green; head finely, sparsely punctate, with a narrow pale 

 chevron behind the clypeus; prothorax rather more than twice as wide 

 as long, finely, not densely punctate, largely impunctate transversely 

 along the middle, the sides subparallel in basal, converging in apical, 



