326 COLEOPTERA OF NORTH AMERICA. 



better to view it as representing a separate series, in which might 

 be placed various foreign tribes in which the wings are not folded 

 at the end. In this connection, it is important to observe that 

 in Stenopterus and Molorchus, which have abbreviated elytra, 

 the wings are not straight, but folded in the usual manner. 



Although the under surface of the head is limited each side by 

 a line, as in other Lepturoides, the line is less defined and the 

 mentigerous process is not more developed than in Cerambycoides, 

 and the mentum has the short transverse form so frequent in that 

 series, and totally unlike the ordinary Leptura type. 



Prof. Lacordaire describes the front coxal cavities as open 

 behind, but they are very evidently closed in N. mellitus. 



Tribe XVII.— EXCYCLOPINI. 



The head is quadrate, suddenly but not strongly narrowed and 

 constricted far behind the eyes (so that the neck is very short) ; 

 front large, quadrate, nearly vertical, eyes finely granulated, 

 obliquely emarginate, with the antennae inserted high up on the • 

 front near the emargination; antennas 11-jointed slender, with 4f 

 joints punctured, the rest sericeous, genae rather long; mandibles 

 small, acute, fringed with hair on the inner margin ; labrum 

 rather large ; palpi moderate, unequal, last joint rounded trian- 

 gular ; hypostoma very distinctly defined each side, mentigerous 

 process short, broad, distinct, mentum large, trapezoidal ; pro- 

 thorax constricted before and behind, wider at the base, tubercu- 

 late on the sides. Scutellum small triangular, mesonotum in 

 Encyclops punctured and hairy, with a very narrow median 

 smooth space, which is carinated, but does not appear to be 

 stridulating ; in Leptalia the stridulating surface is large, and 

 divided by a fine dorsal groove ; in Pyrotrichus not examined. 

 Elytra elongate, parallel, separately rounded in Encyclops, feebly 

 truncate in Pyrotrichus. Front coxa? conical prominent, nearly 

 contiguous, cavities angulated, open behind ; mesosternum trian- 

 gu\u', coxal cavities open externally ; metathoracic episterna 

 narrow, pointed behind ; hind coxae not prominent ; ventral 

 segments nearly equal, the 1st a little longer, the 5th a little 

 shorter. Legs slender, hind pair longer, tibial spurs small ; 

 tarsi in Encyclops slender elongated, 1st joint of all much 

 longer, and on the hind tarsi without brush of hair beneath ; 

 in Leptalia the first joint of hind tarsi is sulcate. with a line of 



