OF Till'. I Mi i.i, BTATB8. |v ; 



Two specimens found on the Gila River, New Mexico. This is q moderate!] Btoul Bpe- 

 cics, intermediate in form between the slender M. vespertinus and the other speci - of 

 this group: the oblique side of the last triangular joint of the palpi is Btraight, bo that 

 those organs appear more acute at the tip than in the other Bpecii 



5. M. vespertinus, elongatos infra testaceus, supra fosens, cinereo pubescens, thoraoe latitu- 

 dine longiorc, punctulato, vittia duabus dilatatia nigro-fosois, Bcutello : idali 



icea, pone medium saepissime interrupta, atriia ol | unctatis, antennia articulit nbae- 



qualibus. Long. "J 7 — "40. 

 Dej. Cat. {». 98. 



iter vespertinus Fair. Syst. El. ■_'. 240: Berbst, Kafer, 1". L81: Say. Tr. Am. Ph. Boo. 6, ITT. 

 ititimus Say, Trail-. Am. Phil. Sue. 6, IT'.'. 

 1 rerm. Zeitacbr. 1, :i-!7. 

 .Middle and Southern States. Varies verj much both in size and c< Imir: the thorai i- 

 occasionally black, with a narrow margin and vitta testaceous: tin type with tin' elytra! 

 vitta entire and uniform is rare; the only specimen I have Been waa given me l>\ Mr. 



\ : the vitta is s< 'time- reduced to a small humeral spot. ..in' aboul the middle, and 



a less distincl one toward- the tip. The thorax is longer, less narrowed m front, and 

 much less rounded ou the sides in the male than in the female: in both Bexes the post< rior 

 angles an' slightly divergent. El. finitimus Say, from a type in Dr. Harris* collection, is 

 a dark variety of tin- species. 



>''. M. auritus, crassiusculus, fuscus, aubtiliter pubescens, tbi avexo, ante medium an i 



tato, angulia posticis vix diverj . confertim punctato, I . oigro-bimacolato, 



angulis posticis vittaque obsoleti is,) scut o, elytris macula utrinqu 



(ad medium sirpe extensa.") altera pic apicali rufc-ti pe obsoletis,)atriiB antice pui 



stitiis subtilissimo punctulatis, pedibus I . antennia basi palli.lioiil.ii-, articul pia 



metis longioribus. Long. -'2 — -29. 

 chr. 5, I In 190. 

 /.' turitus] [erl -?. Safer, 1". 1 I".. 



us crassicollis Melsheimer, Pi . Acad. 2, 214. 



New York, Georgia, Missouri Territory, Lake Superior. Extremely variable in colour; 

 Bom< tens I" ing testaceous above, with merelj the head, margin of the elytra, and 



narrow posterior fascia blackish, while others aro entirely black; lh< ibly 



into each other, bo thai no well defined vari< ties can l»- separated. In Melshi in 

 talogue of described Coleoptera of the United States, his 0. crassicollis it erroneous!) 

 placed under < 'ryptohypnus, but on inspecting the typical Bpecimen I found the tar- a I lobe 

 very distinct The male diners from the female by the thorax l» ing long r and 



rounded on the Bidi 

 T. M. blandulua, Bavo-pubeacena, fo rit- 



. latitudii re, a baai antroraum a ribua vix rotnndatis, pnncti 



oribu< intermixti 



I •:■■(■ latiore fat ralde pun c tat is, inl 



dibua ant' Bavis, lii-i articulia - et '■'< eequalibua, coniunct ; : 



One male -p. en , Georgia* Intermediate inform between M. veapertinua and M. 



