Platynin^ 5 



definite; hind body only moderately convex. [Type E. vixstriatus 

 Bates]. *ElUptoleus 



Prothorax parallel, with moderately, subevenly arcuate sides and sub- 

 truncate apex and base; body very small, rather slender, with 

 thin pallid integuments. [Type PL nigriceps Lee.].. . Platynomicrus 



JO — Body very small in size, the hind body much wider than the head 

 and prothorax, subparallel; lustre sometimes densely sericeous. 

 [Type S. hemhidioides Kirby] Sericoda 



Body larger and generally stouter, more oblong, the hind body never 

 more than moderately wider than the prothorax, the latter usually 

 transversely suboval; form more compact than in Anchovtenus and 

 with shorter legs and antennae; metallic lustre highly developed in 

 one group. [Type European] Agonum 



1 1 — Body small, rather slender and convex, with only moderately thick 

 integument, the head narrow; prothorax much narrower than the 

 elytra, about as long as wide, with arcuate sides, rounded angles 

 and rather large concave subbasal impressions, the sides very finely 

 reflexed, sometimes more distinctly so basally; elytra oval, finely 

 striate; legs and antennae long and slender. [Type European]. 



Europhilus 



The genera marked by a prefixed asterisk are neotropical, none 

 being known from above the latitudes of southern IMexico. The 

 remainder occur for the greater part in Atlantic subarctic regions, 

 Anchomenus, Agonum and Sericoda being common to the Atlantic 

 and Pacific regions; Tanystola is peculiar to the latter part of the 

 continent. As a whole, representatives of the subfamily are much 

 less abundant and diversified in the Pacific than in the Atlantic 

 regions. 



On comparing the Platyninae as a whole with the Pterostichinae, 

 the more loosely articulated body and smaller, narrower head, 

 thinner integuments and absence of the subapical elytral marginal 

 fold in the species of the former subfamily, are features to be espe- 

 cially noted, as well as the generally much smaller size of body. 

 In most respects the Platyninje are intermediate between the 

 Pterostichin^ and the Lebiinae. The elytra are, however, never so 

 truncate at tip as in the latter subfamily and some other types of 

 the Carabida?, which might be thought to be closely allied. 



In most of the Carabidae, as generally well known, there is at the 

 elytral base on each side of the scutellum, a singular modification 

 of the striation, to which very little serious attention seems to have 

 been given. Excepting in Psendomorpha, which probably consti- 

 tutes a distinct family, and a few more normal Carabids such as 



