18 [February. 



form, and longer thorax, and by Ike presence of only one elevated line on each 

 elytron. 



Lytta Cooperi, atra, capite thoraceque laete fulvis, nitidis laevigatis, illo 

 basi subemarginato, ante oculos nigro, hoc pentagonali, latitudine breviore, an- 

 gulis lateralibus acatis, dorso deplanato, elytris lineis elevatis grosse reticulatis ; 

 antennis extus incrassatis, articulis rotundatis, tibiis posticis calcari externo lon- 

 giore dilatato. Lous- - 73. 



Wenass river, to Fort Colville. It affords me great pleasure to dedicate this 

 fine species to Dr. Cooper, to whose taste for natural history we are indebted 

 for the present interesting collection. 



This species belongs to group (A b) of my synopsis of Meloides, (Proc. 

 Acad. 6, 334,) near L. vulnerata, but is very distinct by the reticulated elytra. 



Ditylus gracilis, elongatus ater, tenuiter pubescens, thorace latitudine lon- 

 giore, obovato postice angustato, lateribus antice rotundatis, dense punctulato, 

 late profunde canaliculato, disco utrinque ante medium subfoveato, elytrts subti- 

 liter granulato-punctatis, lineis 4 distinctis subelevatis. Long. 63. 



One specimen found between Fort Vancouver and Yokolt Plain, in July. Very 

 different from the two species mentioned on p. 20, by the more slender form and 

 elongate thorax; the dorsal channel is dilated and bifurcated towards the apex 

 and base of the thorax. 



Phymatodes aeneus, osneo-piceus, parcius pubescens, thorace latitudine bre- 

 viore, rotundato punctulato, antice posticeque marginato, elytris thorace paulo 

 latioribus, nitidissimis, parce punctatis, femoribus valde clavatis, antennarum 

 basi rufescente. Long. *3. 



One specimen found betw r een Fort Vancouver and Yokolt Plain. Somewhat 

 resembles in appearance P. sereus. 



Asemum a s p e r u m, nigro-piceum, tenuiter pubescens, capite scabro-punctato, 

 oculis magnis valde emarginatis, thorace latitudine breviore rotundato, punctato, 

 medio late excavato, versus latera punctis elevatis exasperato, elytris subtiliter 

 scabris, lineis duabus obsoletis vix distinctis. Long. *7 *9. 



Prairie Paso, July to August. This fine species seems intermediate between 

 Criocephalus and Asemum ; the eyes, although nearly as large as in the former 

 genus, are deeply emarginate; the antennae are hardly half as long as the body, 

 and pubescent. The discoidal excavation of the thorax does not extend much 

 in front of the middle. 



Crossidius ? h i r t i p e s, ater, thorace confertim punctato, latitudine breviore, 

 lateribus obtuse armatis, basi marginata, disco utrinque pone medium subfo- 

 veato, elytris confertim subtilius punctatis, fulvis, sutura basique nigro-margi- 

 natis, abdomine sanguineo, basi obscuro ; subtus parcius longe pilosus, tibiis 

 intus dense pilosis. Long. *5 



One specimen, Wenass river to Fort Colville. The palpi and antennae are 

 destroyed: it is possible that this should form a separate genus, but the man- 

 dibles are emarginate at tip as in Crossidius, from which it seems to differ in 

 having the thorax obtusely armed at the sides, as in Purpuricenus. The upper 

 surface may have been hairy, as in C. testaceus, but the hair is now en- 

 tirely removed. The elevated lines of the elytra are hardly visible. 



Toxotus flavolineatus, niger, flavo-pubescens, thorace antice posticeque 

 valde constricto, nitido parcius punctulato, canaliculato, lateribus tuberculo magno 

 acuto armatis elytris a basi angustatis, thorace duplo latioribus dense punctu- 

 latis et rugosis, margine a basi fere ad apicem vittaque dorsali postice evanes- 

 cente antice abbreviata utrinque ornatis, apice intus subtruncata. Long. 1*0. 



One specimen, Fort Vancouver to Yokolt Plain. On each side of the yellow 

 dorsal vitta is a distinct elevated line. 



Strangalia vitiosa, nigra, flavo-pubescens, capite rufo-variegato, thorace 

 confertim punctato, latitudine breviore antrorsum angustato, lateribus subangu- 

 latis basique subito depressa testaceis, disco nigro, subcanaliculato, postice utrin- 

 que oblique impresso, elytris punctatis fiavis, a basi angustatis, macula laterali 



