I 62 CASEY 



3 Gular sutures uniting anteriorly, forming a single groove for a 



short distance behind the mentum ; hind coxae feebly oblique, long 

 and cuneiform, distinctly separated, the abdominal process trun- 

 cate ; antennae with a 3-jointed club ; elytra widely embracing the 

 body, the epipleurae abruptly dilated at base. Tropical Atlantic 

 North America Branchini 



Gular sutures rapidly diverging apically, delimiting a transverse piece 

 at the base of the mentum 4 



4 Hind coxae oval, subtransverse, distinctly separated though very 



moderately, the abdominal process truncate to rounded; elytra 

 rather widely embracing the sides of the body, the epipleurae 

 rapidly dilated at base; antennae with a 3-jointed club. Peru and 

 Chile *Praocini 



Hind coxae slender, much longer, strongly oblique and cuneiform, 

 narrowly separated, the abdominal process acute or narrowly 

 rounded ; elytra widely to very narrowly embracing the sides of 

 the body, the epipleurae sometimes abruptly dilated at base ; an- 

 tennae with a 3-jointed club. 1 Western temperate North America. 



Coniontini 



5 Ligula and gular sutures nearly as in Coniontini, the hind coxae 



also similar ; fourth abdominal segment relatively much less ab- 

 breviated, somewhat as in Praocis; pronotum differing from any 

 of the preceding tribes in having a coriaceous basal margin ; 

 elytra narrowly embracing the sides of the body, never acutely 

 margined at the sides, resembling in this way only certain of the 

 subtribe Eusatti of the Coniontini ; legs rather short. Sea- 

 beaches of Southern California Coelini 



The gular sutures in Coniontini are rather inconstant, some- 

 times being very distinct behind the mentum and sometimes 

 wholly obsolete ; it was this inconstancy that occupied my atten- 

 tion when on page 54 (ante), I stated that these gular characters 

 seemed to be rather equivocal in separating the Coniontini and 

 Branchini, but I am now convinced that they will serve this 

 purpose as suggested by LeConte. The tribe Nycteliini, as 

 outlined above, will comprise at least two genera which may be 

 defined as follows : 



1 In the Coniontini the antennal club becomes a very variable feature. In the 

 subtribe Coniontes the antennae have an obvious, though feebly enlarged, 3- 

 jointed club. In the Eusatti, however, the character is very inconstant, Disco- 

 demus and Megasattus having no trace of a terminal club any more than in 

 Nyctelia ; Nesostes and Sphceriontis have a feeble 3-jointed club, but Eusattus is 

 composite, dubius having an obvious club of three joints, while the species from 

 productus to the end of the genus have no trace of an apical enlargement. I 

 think therefore that the genus Conipinus, for dubius, nanus and oblongulus may 

 have to be maintained. 



