NORTH AMERICAN POI.KOl'TEUA. 



81 



1- I'rosti'iiiiil 

 I'll wliich it is 



i'ly IniiH'iitcil. 

 (VlVtM'fil with 



iilii ilisidinicii 



^.illll' Cllldl' Jis 



(iillnwill!:- 



lirsl Jiiint 1)1" 

 liliick. Tti,. 



. and (livtT- 

 s in a coni- 

 isfniiii.s and 



I'V. 



uliUc. Lust 



,i"ii)r iMiich 



Mil Ihc Jipi- 



iiiicriiirly 



Elytra 



iiiiiili'i'alc. 



d l<v |.a- 



l:lu.isc,iii 



III' iiiir (jf 



o«'In!^a. 



HUlldU. 



Mirliice 



!■> -|)MI'.SC 



I'-'Ji lll'IMtJ 



'I'' is nil 

 HI lolii;; 

 ilioriix 

 ivvi'd 1k'- 

 iiiy rir- 



Willcll- 



iiiu; |iiislnricirly . kiiiihIciI si'|i:ii'.ili'ly lii,'liiii(|. Imigei' tiiuii llio liiMil ami jinitliorax 

 togotlit.'i', aiicl luaviii;; I lie last third nf the sucoiul, llii' tlufil, fnirth and liflh ven- 

 tral scgiiieiits (!.\i>oiod. Aiitoiiiiae iis Imi!,' as the elytra, lirst joint inndcrati.', snh- 

 t;liil)iilar ; Joints two toidi'veii, niiiidi narrower, snh-e(|iial, but ini'i'eusing |ierceiitibly 

 ill li'iii^tli toward the tip. I.rii:ctli 1 .'.I iiiiii. 



I'lato V. I'V 7. 



I am aware of only tuiir siuriniciis. all IrDin Toxas. 



2. I. illlllllllKiia Ueit. — Form modiMa'eiy elcjiirated and depressed. Siirfaeo 

 sliining, free from pubo.seenee. I'unetures of head and pnithorax eoarse, anil 

 rather close, ("dor of male brownish bhiek ; of female rather dark einereo-testa- 

 oeons. Head snli-qiiadrate: eyes small. Hat and their own length in advance of 

 prothora.x. Prothorax of «ame width as head, very sligiitly broader than long, 

 and strongly narrowed posteriorly: sides irregularly undulated. No traces of 

 lateral striae. Elytra very .slightly longer than head and jirothorax together, 

 leaving last four abdominal segments e.x[)osed, broader posteriorly; width ai'ross 

 tlie base almost equal to that of head. Antennae equal in length to elytra, rather 

 stout, coarsely and sparsely [)ube.scent; joints sub-equal, last joint elongated, and 

 constricted strongly near the tip into a cylindrical process, as in HehJpeplns. 

 Length 2.ti mm. 



Plate V, iMtr. 8. 



Oriirinally deseritu'd by Rcitter, T liiive before me two specimens 

 from I'iney I'oint, Md. (Suliwarz) 



The prineipul point.s of distinction between the two .speeie.s tire the 

 size iind structure of the antennae, .slitipe uf the head and eyes, and the 

 piinetiiation. The intemmu'iits in the last species tdso seem to b(! a little 

 denser thtiii in the first. The peeuliiirity in the structure of the last 

 joint of till! anteniKie, mentioned in the description of iininttinia, tdso 

 exists in nc/nsa, but to a less nuirked dej^rue. 



I..|-:.nOI*III.<i:US De f'asteln. 

 Mentuin very short. Ligula (^irneoiis, entire and roundcil in front: mandibles 

 generally short, bi- or Iri-denlate at their extremities. Labrum transverse, usually 

 entire; outer lobe of maxilla rounded at the extremity, wiiere it is densely cili- 

 ated; inner lobe toriuinated by a corneous hook. Aniennae variable. Eyes mod- 

 erate or small, convex. Head not restricted behind. Tarsi with the lirst joint 

 small; middle ami posterior four-joiiite<l in the male, all others five-jointed. Hiniy 

 more or less dejiressed. 



In the study of tliis u'enus we are met by peculiar difficulties, iiltluiuiih 

 the species edmiirisino it present a iieneral y(»t?(V.>e which is unmi.stiikable. 

 The uiales iind iem:iles differ very much, !ind. jis in tiie FiUc:inidae. the 

 former are in most ciuses the laruer, and often of different form. This 

 iilone serves to make the study of a mass of undes'-ibed species u very 

 unsatisfactory one. The antenntie may bt; termiiiiited by a well-markt'd 

 club, may lie filiform or even attenuated, and are often clubbed in th<' 

 female, and filiform in the male. The first joint luiiy be verv short. V(>rv 



TIUNS. AMKH. KNT. .SOC. XI. 



(21) 



PEniiUAnr, lfiS4. 



