HARPALIN^E 63 



the opinion of Dr. Horn that the organs of the mouth were of less 

 weight in the classification of the genera of Carabidse than they 

 had been held to have, and this is probably true generally, but in 

 this particular tribe I find them to be decidedly useful ; the dentition 

 of the mentum however, here, as well as in the Anisodactylini, 

 loses much of the value that it possesses elsewhere and more especi- 

 ally in the large tribe of very small species, known as the Acupalpini. 

 In the subjoined table, many of the foreign genera are omitted 

 because of lack of material, but so far as represented in my col- 

 lection they may be arranged as follows: 



Basal joint of the hind tarsi seldom much elongated, more or less evi- 

 dently shorter than the next two combined; elytra never opalescent, 

 though sometimes metallic 2 



Basal joint much elongated, equal to or exceeding the next two combined, 

 the elytra always having strong prismatic iridescence as in many of 

 the Selenophorini 10 



2 Paraglossae diverging apically, more or less narrowly rounded at tip 

 and much longer than the ligula 3 



Paraglossae more rounded, generally broadly rounded and thickened at 

 apex, more or less nearly equal in length to the ligula; alternate elytral 

 intervals rarely with serial punctures at apex, the only instances 

 observed being on 7 or 5 and 7 in certain Acinopus and Artabas . . .5 



3 Elytra with serial punctures on intervals 3-5-7 toward apex, as in 

 Glanodes of the preceding tribe; body Cratacanthus-like in habitus, 

 the prothorax cordiform, with right and sharply marked basal angles. 

 Sonoran regions Opadius 



Elytra without trace of serial punctures on intervals 3-5-7 4 



4 Body Cratacanth its-like in habitus, compact, oblong, the hind angles 

 of the prothorax sharply rectangular; integuments very pallid in 

 coloration but thick and solid as in Geopinus; mentum tooth want- 

 ing or vestigial, the elytra without a dorsal setigerous puncture. 

 Gulf regions Pharalus 



Body with a somewhat Acinopus-like facies but very small in size, the 

 basal thoracic angles broadly rounded; integuments dense, black 

 as usual; second labio-palpal joint longer and relatively thinner than 

 in any other genus of the tribe; head very large; mentum edentate. 

 South Africa *Micracinopus 



5 Anterior and middle tarsi subequally dilated in both sexes but bi- 

 seriately squamose beneath only in the male as usual; second joint 

 of the labial palpi much longer than the third; mandibles stout and 

 strigose; basal thoracic angles broadly rounded; head large; mentum 

 edentate. Palaearctic regions 6 



Anterior and middle tarsi dilated much more strongly in the male, where 

 they are biseriately squamose beneath 7 



6 Head rather long behind the eyes, subparallel and not constricted; 

 body broad and of large size, the tarsi all very stout; marginal stiia 



