88 Memoirs on the Coleoptera 



episterna nearly twice as long as wide ; tarsi very slender. Length 

 (9 ) 7.6 mm.; width 3.0 mm. Indiana. Levette collection. 



luculentum n. sp. 

 Upper surface less convex; striae feebly impressed, the sides of the elytra 

 parallel, finely reflexed and but feebly arcuate, similarly rapidly 

 rounded at base; black, the anterior parts obscurely viridate, the 

 elytra black or very slightly seneous, polished; legs obscure rufous, 

 the femora brighter and more flavate, infumate at the knees; head 

 nearly as in the preceding, the eyes large and rather prominent; 

 palpi paler basally than distally; antennae similar, three-fifths as 

 long as the body, the third joint shorter than the fourth; prothorax 

 a fourth wider than long, the sides strongly, subevenly arcuate and 

 finely reflexed, a little more so at the very large and deep, finely 

 punctulate foveae, which are traceable not quite to the middle; 

 angles broadly rounded; base usually somewhat narrower than the 

 apex, though sometimes fully as wide, irrespective of sex; elytra 

 rather gradually rounding behind, with very feeble sinus, one-half 

 longer than wide, four-fifths wider than the prothorax, these pro- 

 portions nearly as in the preceding species but more elongate than 

 in breviceps; striae fine, grooved, the punctures distinct and well 

 separated but not large, crenulating the intervals, obsolete in about 

 apical third; fifth stria similarly very feebly indented near apical 

 fifth; anterior male tarsi very feebly dilated. Length (cf 9) 6.5- 

 7.2 mm.; width 2.35-2.6 mm. Alabama (Calvert, Mt. Vernon and 

 Mobile), — Loding; Texas (Galveston). [PL crenulatus Lee.,— 

 Georgia] striatopunctatum Dej. 



The single female from Alabama placed with the female type of 

 ovalipenne, from North Carolina, seems to agree very well, though 

 having the convex oval elytra a trifle less elongate. In this and 

 others of that section, the feeble subapical indentation of the fifth 

 stria, noticeable in the striatopunctatum section, is completely 

 obsolete, as it is also in nutans; this indentation is homologous 

 with the larger feeble dent observable in some other species, as in 

 Anchomenus cincticollis and Pseudanchus excavatus; in Circinalia 

 ceruginosa and undulata, it lies at the middle of the elytra. The 

 species of Micragonum are often rather closely allied, but can be 

 distinguished readily among themselves on actual comparison. 



Group III — picticorne 



Subgenus Tetraleucus nov. 



It seems necessary to propose a separate subgeneric name for 

 one of the most remarkable Platynids known from our fauna, 

 described many years ago under the specific name picticornis by 



