rnl. Cnl-TCl; L HI 1H; I'l 1 1 I.I 1 >.E. ." | ."> 



rounded and not amt.-K |M.inti-il hi-tin.-i striation of the elytra is rare in 



Tn.pi~t.Tim-. Imt it scarcely seems p..,,ihle to refer thi> >p.-cies elsewhere. 

 l.cn-th ..('elytra, C.5"""; breadth of c..iiil)in.-<l elvtra, V" 

 <;rcen Uiver, Wyoming. ( )ae specimen, Nos. 3!s; and4i>S4. 



TBOPISTERNUS SAXIAUS. 



I'l. 8, Fi. li. 

 /'/", irialin Snnlcl., Hull. U. S. Genl. Goo^r. Siirv. Terr.. IV, 7">9-7fiO (1-T 



< >nc specimen and its reverse, found by me in tlie (jrreen River shal.--. 

 rcpiv-eiits .1 >|.. -ri.'S i>t Tropistemus nearly as larjfe as T. binotatus Walk, 

 fr.im M.'xi.-.i. The large size of the head and the shortness of the prothorax 



an- di.ulitl.-~~ due to the mode of preservation, the whole of the head, 

 deflected in lite, liein^ shown, while the thorax is in some \vav (..rc-.lh.i-i- 

 cucil. [n all other respects it agrees with the llyilrophilida-, and cspeciall v 

 with Trojiisternus. having the form of the species mentioned. The h.-a 

 lir..ad and well rounded, with small, lateral. p.t.-rir eyes. Tin- tli..ra\ i^ 

 much broader and much more than twice as broad as long, \\ith rounded 

 side-. t;i|ierinu anteriorly, the front margin broadly and rather deeplv c,.n- 

 cave, the hind 1. order gentlv convex; the scutelhim is large, trianunl .1 . .1 

 little longer than broad. Tlie surface of the thorax and elvtra i- api.ar- 

 ciitl\ >niooth; at least no markings ar.' discoverable, e\.-e|.tini: the line ..(' 

 the inner ed^e . .(' the interior margination of the sides of the elvtra, which 

 appears through the latter, as do also the abdominal incisures and the hind 

 femora and tibia-. These legs are longer and slenderer than in T. bin.<- 

 tatii^, the Icini.ra extending beyond the >id.--~ o| the abdomen, and the tibi;e 

 are armed liciieath at tip with a pair of slender >pin.-s, which together with 

 the tiliia' arc aliniit as Idiiu a < tin- teinora. 



l.cn-tli of body, i;.i;.V" ni ; of elvtra, 4.4")""" : breadth of middle of body, 



. 



3.25' ; 1. -ii-th of hind femora, 2"""; of hind tibia-. I.!'/)""" 



(ii.cn iJiver. \\'yoming. ( me specimen, Nos. ID'J.'I and M'-JT 



in huociirs ;,. n uar. 



1 1 vni;..i urs AMICTUS. 



IM. 1, Fi. 47. 

 \ single tra^mentar\' el\ ir..n indicates .. -\ '> - ..t al...nt the size \ 



11. Bubcupreufl Hand., and in general resembling it I'he li^nre doe> not 



