Platynin^ 



45 



from lymphaticiis in the subangulate sides of the prothorax, and 

 simplicior Bates, also described from near the Mexican capital, 

 apparently has a narrower prothorax and the lustre is said to be 

 slightly aeneous. None of these descriptions mentions the small 

 elevation of the surface just outside of the pronotal foveae, which 

 is a conspicuous feature in lymphaticiis. There are evidently a 

 considerable number of these very small Anchomenids in southern 

 Mexico and Central America; they constitute rather a distinct 

 group, perhaps of subgeneric nature; they seem to be devoid of 

 hind wings, the rounded sides of the elytra being scarcely more 

 arcuate toward the humeri. 



Group V (funebris) 

 Subgenus Pseudanchus nov. 

 The numerous species of this group differ much from the pre- 

 ceding in general appearance, due to their smaller size, more slender 

 form and prevalence of more or less diversified color, which is 

 virtually wanting in any of the other groups; some species are, 

 however, deep black, and others have slight metallic reflection. 

 Examining more closely, the species are all distinguished from any 

 of those which precede by the structure of the sides of the pronotum, 

 the surface being convexly declivous to the finely refiexed edge and 

 without trace of the more or less broad gutter of the other groups, 

 caused by the broadly reflexed edges. Most of the species are 

 peculiar, also, in Anchomenus, in having more numerous finer dorsal 

 elytral punctures, although there are some, such as excavatus, which 

 have only the usual three; the number of dorsal punctures is not 

 very important, however, as it is a variable feature, in most of the 

 genera. Those species at present in my collection may be divided 

 into four distinct sections as follows: 



Third and fourth antenna! joints subequal in length, sometimes with the 

 third joint evidently the longer; dorsal punctures of the elytra 

 three in number 2 



Third joint shorter than the fourth; body more diversified in color.. . .3 



2 — Body black, only rarely with slight metallic lustre; basal thoracic 

 angles always right and very sharply defined to prominent; three 

 elytral punctures fine. Pacific coast regions. 



Section Pseudanchus in sp. 



Body metallic in lustre, the thoracic angles obtuse but not rounded; 

 three elytral punctures very large, broadly impressed and foveiform. 

 Atlantic regions Section Taphranchus nov. 



