216 COLEOPTERA OF NORTH AMERICA. 



Tribe VI.— ZOPHERI1VI. 



Body elongate, apterous, rough, covered with elevations ; 

 epistoma truncate or broadly emarginate ; labrum uncovered ; 

 mentum large, leaving the base of the maxillae and sometimes the 

 ligula exposed, inserted upon a very broad, short, guhir process ; 

 head received by the prothorax as far as the eyes, which are 

 very transverse and very finely granulated ; antennae with the 

 outer two or three joints usually connate, elytra but feebly em- 

 bracing the flanks, without distinctly defined epipleuraa. Meta- 

 sternum short, with narrow side pieces ; middle coxae without 

 trochantin, inclosed by the sterna. Anterior and hind coxae very 

 widely separated ; intercoxal process of the abdomen broad, rect- 

 angular ; tibial spurs very small, or wanting. 



Our genera are as follows : — 



Tarsi sulcate beneath ; ligula concealed ; 

 Antennae received in very deep grooves ; 

 Joints of antenna? 9 — 11 connate, truncate at tip. Zopherus. 



Joints of antennae 10 — 11 connate, pointed at tip. Phlojodes. 



Antennal cavities obsolete behind, antennae as in Phlceodes. Nosekus. 

 Tarsi not sulcate beneath ; ligula prominent ; antennae not received in 

 cavities ; 

 Antennae 11-jointed, 10th joint wider than the 9th and 11th. 



Phellopsis. 



Zopherus occurs in Texas, New Mexico, and Colorado Desert. 

 To Phlceodes belong Nosoderma diabolicum and pustulosum Lee, 

 found in California ; the genus is indicated but not named by 

 Lacordaire. The type of Noserus is the Californian Nosoderma 

 plicatum Lee. To Phellopsis belong Boletophagus obcordatus 

 Kirby, from Canada and New England, and Nosoderma porcatum 

 Lee, from Oregon. 



The genus Nosoderma does not occur in our territory ; it differs 

 from Phellopsis by the antennae having the 10th and 11th joints 

 connate into a rounded mass. 



Tribe VII.— 1> AC ODERIM. 



This tribe contains but a single species Dacoderus striaticeps 

 Lee, a singular insect, of small size, found under bark, at the 

 junction of the Colorado and Gila Rivers. 



Body elongate, not convex, apterous ; head constricted behind 

 into a narrow neck ; eyes coarsely granulated, oval ; mentum 



