H. C. FALL. 155 



and more elongate; beak not notably diflFerent in the sexes, dilated and strongly 

 attenuate, strongly punctate laterally, more finely above and toward the tip, 

 which is polished to a greater or less extent. Front with a short sulcus, which 

 may become obsolete. Prothorax very nearly as in rostrum, a trifle narrower; 

 surface densely, a little less coarsely punctate; basal fovea profound. Elytra 

 either parallel or decidedly wider behind the middle; intervals narrower than 

 in rostrum, with a tendency to become slightly convex. 



% . Siitural angles broadly rounded ; all the tibite armed with a short, neaily 

 simple mucro. 



9- Sutural angles obtuse ; tibise unarmed. 



Hob. — Florida. 



Ill all of the four examples seen the sutural stria is more strongly 

 impressed. This species agrees with the preceding in the all around 

 tibial armature and the strongly angulate superior margin of the 

 aritennal fossae, both very unusual characters and not present in any 

 of the more nearly allied species. From commodum it is distin- 

 guished by its smaller size, generally more parallel form, flatter 

 elytral intervals, more slender and more strongly attenuate beak 

 and simple tibial mucro. Both species differ notably from rostrum 

 by the smaller tarsi, the second joint longer than wide and longer 

 than the lobes of the third joint. 



IV. 



The species here grouped agree in having the claws toothed and 

 the male tibiae unarmed. The number is somewhat less th;in in the 

 preceding section, exhibiting, however, a greater divergence in the 

 minor points of structure, color and vestiture. Here will be found 

 nearly every species {perminutmn being the only notable exception) 

 showing any departure from the usual black color, either in body or 

 appendages. It is worthy of note that none of the species have the 

 broad, shallow, frontal sulcus, so often seen in the preceding section, 

 the nearest approach to it being in xanthoxyli. The presence of 

 • such a sulcus would point with reasonable certainty to Section III, 

 in case of doubt through the absence of males. With few excep- 

 tions the species separate easily and may be distinguished as follows : 



Color wholly or in part brown ; male tarsi not spined 7. 



Color black ; appendages often pale. 



Front coxae (at least in the % ) yellow 74. aiiripes. 



Coxfe dark 1. 



1. Antennaj entirely black, or at most merely picescent at base 4. 



Antennse in part pale. 



Femora and tibiie pale 3. 



Legs black. 



TRANS. AM. ENT. SOC. XXV. OCTOBEK. 1898. 



