NORTH AMERICAN COLEOTTKIIA. 



76 



a» 



in many instnnccs, HticniH to be (jUiidnitc, llins iipprnjicliinjr dnitatiiit. 



Iliiwt'Vt'r, many utlior cliariieturs, not iiowsi'ssed in coniiuon, lead au; to 



liciicvc that tlio two Hpci-ios arc diHtinct. 



In Crotch's checit list thoro is a variety of A'. ile.ntdtuH jriven as N, 



7)niji>r. I have had an opportunity for examining this also, and find that 



it is simply .V. i/nifnfus. without any diHerenee at all, as far as 1 ean 



diseover. 



aub-fmiiily II.-PASSANDHINAi;. 



Maxillae concealed b}' corneous plates, which project from the lateral 

 borders of the buctial openinjr. Mentum very short, linear ; lijrula eor- 

 n(!ou,<. Klytra (tovering th»! entire abdomen. Anterior and i.'iiddle coxae 

 jrlobular. Anterior coxal cavities open behind. Tarsi pentamerous in 

 both sexes, firsc joint often very short. Body clonptted, dctpressed, or 

 sub-cylindrical. Antennae filiform, last joint ((.in pressed, and often cari- 

 nated ; extremities of mandibles simple. Head .juadrate; oyes moderate, 

 coarsely granulat«'d. 



The sinjrular insects whicli constitute this sub-faraily are found under 

 bark, and are, in jreiieral, mucb larger tlian tho.Ke of the one last des<;ribe(l. 

 The various genera arc fpiitc heterogeneous in general appearance, and 

 may be analyzed as follows : 



Jugular p!at09 irmru or loss bnuid mid tlutteiicd. 



First joint of tarsi very short CntoseiiiiN. 



First joint of tiirsi of normal length Ncaliilia. 



Jugular plates long i ii<i acute PrOMtoillilii. 



CMTOGKNIIK Wesiw. 

 Antennae rohust, joitils one to ten nearly globular, lirst largest, se('<ui(l suiallest : 

 lasL joint t(ini])resse(l, iind cariiuile along the verte.x. Mesoslernuni Hat between 

 the middle coxae. Body elongated and nuite depresse<l. 

 We have in our fauna but one species. 



1. C\ rillTllS (Fubr.j. — Dark castaneous. Elytra deeply and closely striate. 

 Prothoi'iix punctured (piite uniformly wi;b the exception of a inedjan line, which 

 is free from punctures. Autenniie inserted in the anterior portion of grooves in 

 the side of the head, in the posterior portions of which the eyes are situated ; cili- 

 ated on the sides which would naturally be broueht into mutiuil contact. Eyes al- 

 most invisible from above, mo.'.- siilicnl fnuii l)elow. Length H.S — 1,'!.0 mm. 



Pa., D. C. Dae, Ariz., Xeb. i'late V, Fig. 2. 



This species, which is couin on and widely distributed, is very variable 

 in size. The jugular plates are large, :ind their borders are suddenly 

 thickened into a sort of lip. 



M€AMDIA Erichs. 

 Head sub-oval and obtuse, not contracted behind. Kpistonui eniarginate in the 

 middle. Eves oval, small, coarsely granulated. Last joint of antennae not larger 



