42 COLEOPTERA RHYNCHOPHORA. 



tropical American Phyllotrox is still uncertain, but it may be 

 stated as a fact that the two species described by LeConte — 

 nubifer and ferrugineus — are at least subgenerically and prob- 

 ably generically distinct, and that his series of nubifer in- 

 volves two very distinct species, one of which is congeneric 

 with the Floridian ferrugineus. The true nubifer is at once 

 easily separated by its short feebly curved beak, finer elytral 

 striae, which are usually more or less irregularly or con- 

 fusedly punctured toward the base, the more densely punc- 

 tate elytral interspaces and usually by the prothorax and 

 elytral suture — especially toward the base, being more or less 

 blackish — whence the name. In the undescribed form mixed 

 with nubifer the beak is longer and more arcuate, the elytral 

 striae coarser and regularly punctate throughout, the inter- 

 vals more sparsely punctulate, the legs less stout, and the 

 upper surface never with darker areas. As indicated above, 

 these characters are shared with ferrugineus, and to these 

 two may be added three other apparently distinct forms to 

 be described below. 



With 7iubifer belongs the New Mexican quadricollis de- 

 scribed by the writer,* and for these the genus Phyllotrox 

 may be retained pending further information. Ferriigineus 

 and allies are less in harmony with the preceding than they 

 are with Euclyptus Dietz, to the generic description of which 

 they conform closely and to the type of which — E. testaceus^ 

 — they are very similar. The genus HyPoleschiis\ recently 

 described by the writer is very near Euclyptus, differing 

 chiefly in its sharply toothed claws, long second funicular 

 joint and black color. In the species of the ferrugineus series 

 the claws are merely thickened and obtusely angulate at 

 base, while in nubifer and quadricollis they are quite simple. 



The two species of Phyllotrox known to me easily separate 



as follows : 



Size larger, prothorax relatively wider, beak a little shorter, antennal 

 club longer than funicular joints 2-7, pygidial groove not 

 attaining the apex (New Mexico) quadricollis. 



* Trans. Am. Ent. Soc, XXXIII, 1907, p. 265. 

 t Trans. Am. Ent. Soc, XVIII, 1891, p. 272. 



