26G 



REVISION OF THE TENEKRION1D7E OP AMERICA, 



TRIBE IV — CNEMODINI. 



Mentum large, completely filling the gular space, lateral processes of gula triangular, 

 applied against sides of mentum. Front with a prominent middle lobe completely con- 

 cealing the labrum. Presternum not produced. Mesosternum short, not prominent be- 

 tween the coxa? ; coxa; entirely enclosed by sterna, trochantin visible. Metasternum long, 

 (body winged) parapleural parallel. Intercoxal process of abdomen acute. Tarsi with 

 two rows of short spine-like hairs. Legs slender, anterior with the apical angle produced 

 and with a single short spur. Antennae 11-jointcd, last joint oval acuminate. 



CNEMODUS, Horn. 



Mentum large, transverse, concealing maxillae and ligula, hexagonal, rounded in front. 

 Labrum concealed. Mandibles deeply cmarginate and with an acute tooth at tip, and 

 deeply grooved on their outer face. Maxillary palpi short, first joint obconical and larger, 

 second shortest, last oval. Front with a prominent middle lobe, with a reflexcd margin 

 and cmarginate, sides of front broadly rounded; head short, broader than long, eyes 

 prominent and coarsely granulated. Antennae equalling half the length of body, rather 

 slender, slightly thicker at tip, glabrous ; joints nearly equal in length, except eleventh, 

 which is shorter, oval and acuminate at tip ; joints thickened at distal extremity. Thorax 

 slightly transverse, somewhat narrower than the elytra. Scutellum triangular, longer 

 than wide. Epipleurae extending to the tips of elytra, narrow, anteriorly badly defined. 

 Legs slender, tarsi long, slender, exceeding in length their respective tibia;; joints slender, 

 cylindrical, last joint longer. Anterior tibiae flattened, external apical angle prolonged, 

 and with an acute tooth at middle of external edge, and with a single spur. 



With the above characters I define a tribe and genus having nothing known to me, 

 allied to them. In form the unique species resembles Hypselops, Sol., and it is possible 

 that this South American genus should be associated with the one now under considera- 

 tion. So many curious characters arc found blended in this insect, that it is really diffi- 

 cult to tell to which most prominence should be given. The legs bear a striking resem- 

 blance to those of some of our Lamellicornia, as Macrodactylus or Dichelonycha. 



C. testa c ens, yellowish testaceous, head ohtusc, as long as broad, moderately coarsely punctured between and 

 in front of the eyes. Thorax wider than long, convex, sides broadly rounded, anteriorly feebly emarginate, angles 

 obtuse, posteriorly truncate angles distinct, disc nearly smooth, moderately shining, more coarsely punctured toward 

 the lateral margins. Marginal line scarcely distinct, pronotum almost continuous with the flank. Elytra elongate, 

 subparallel, twice as long as head and thorax, surface shining, and densely acieulately punctured, humeral angles dis- 

 tinct, obtuse. Beneath faintly and sparsely punctured and sparsely clothed with yellowish hairs. Length .32, 

 width .11 inch. 



The whole surface of the body appears to have been, when recent, covered with very 

 short, sparsely placed, sub-erect hairs. Those on the under surface of the body are short, 



