Coleopterological Notices, VI. 1t3 



in Florida,, in which region the}'^ seem to particularly abound. 

 There are, however, also a large number of northern Atlantic 

 species, but onlj^ a single one is known at present from the Pacific 

 coast. A considerable number of Mexican species have been re- 

 cently described by Mr. Champion. 



I have no hesitation whatever in separating our species into 

 numerous genera, the generic characters being as pronounced as 

 in almost an}- other grou)) of Coleoptera, but as the tj-pes of 

 X^'lophilus, Euglenes and other of the older genera are unknown 

 to me at present, I am forced to give them all distinct names, the 

 probability being that none of them will prove entirely identical 

 with any hitherto described.* These genera are the following : — 



Muzzle not prolonged before the point of anteunalinsertiou 2 



Muzzle prolonged; body very minute 11 



2 — Head constricted at base; epistoraal suture deep and distinct 3 



Head not constricted at base 10 



3 — Basal joint of the hind tarsi very long 4 



Basal joint of the hind tarsi shoi't, much shorter than the remainder 9 



4 — Eyes deeply emarginate 5 



Eyes feebly or moderately emarginate, the notch sometimes almost obsolete.. .6 

 5 — Head deeply sinuate at base; antenna^ thick and suhcylindrical, the second 

 joint obliquely truncate; Aestiture short, matted and duplex... Eloims 

 Head truncate at base; vestitvrre long, stiff and simple. 



Antenna inserted within the eye on the emarginatiug canthus, strongly 



flabellate in the male, not observed in the female EiiieliuilS 



AntenniE simple in both sexes, inserted just without the eyes, which are 



generally not quite so large Zoiiantes 



6 — Prothorax not prominent at the sides; eyes more or less coarsely faceted as 



usual 7 



Prothorax angulate and prominent at the sides anteriorly 8 



1 — Second and third antennal joints small PlioiiialllS 



Tliird antennal joint elongate. 



Prothorax as wide as the head; last antennal joint abruptly enlarged. 



A riot us 



* In general neatness of appearance, diversity of structure and individual 

 rarity the Xylophilinte may be fancied to bear much the same general rela- 

 tion to the other Anthicidse that the Eucneminaj bear to the rest of the Elater- 

 idiE, and the weights of the two subfamilies, with regard to the remainder of 

 their respective families, are about equal. The ratio of species to genera among 

 our representatives of Xylophilinse is at present nearly 3, while among the 

 Eucnemina; it is only about 2.5, and even in the Cerambycidai it is not quite 

 3.5. The absolute value of the generic differences I hold to l)e about equal in 

 the three cases. 



