"230 LAKE SUPERIOR. 



/ 



w nigriceps. HYDNOCERA Nm. 

 SILIS Meg. difficilis Lee. An. Lye. 5, 27. 



13 longicornis. XYLETINUS Lair. 



14 difficilis. fucatus Dej. Cat. 

 MALTHINUS Latr. DOKCATOMA Fabr. 



fragilis. ocellatum Say Exp. 2, 273. 



parvulus. ANOBIUM Fabr. 



niger. foveatum Kb. N. Z. 190. 



CoLLOrs Er. errans Mels. P. Ac. 2, 309. 



tricolor Er. Monog. 57. OCHLNA Zieg. 



MalacUus trie. Say. J. Ac. 3, 182. nigra Mels. P. Ac. 2, 308. ' 



CLERUS Fabr. King. ANTHICUS Fabr. 



undatulus Say. B. J. 1, 163. 4-guttatus Hald. P. Ac. 1, 304. 



nubilus Kl. Man. Cl. 386. 15 terminalis. 



Thanasimus abdominalis Kb. 244. 1S difficilis. 



thoracicus 01. 4, 18, pi. 2, 22. " scabriceps. 



ie T. nigriceps. Pallidus, sparse longius cinereo-pubescens, capite postice nigro, 

 thorace latitudine vix breviore, subquadrato, margine uudique elevato, disco modice ele- 

 vato, medio late impresso, elytris distinctius punctatis, medio leviter infuscatis. Long. 



17. 



The 3 rd and 4' h joints of the antennce are equal, each being one third longer than 

 2<l ; palpi a little dilated, postpectus fuscous ; claws bifid. 



13 S. longicornis. Nigra, sparse pubescens, thorace latitudine triple breviore, Isete 

 tiavo, margine antice posticeque nigro elevato, angulis posticis acute incisis, leevi; ely- 

 tris minus subtiliter punctatis mandibulis flavis. Long. -2. 



The antennee are very long ; the 2ud joint very short and the 3 rd equal to the 4" 1 ; 

 the lateral margin of thorax is very narrow. 



' S. difficilis. Nigra, cinereo-pubescens, thorace latitudine triplo breviore, antic* 

 angustato, Itcte rufo, margine nigro, antice posticeque elevato, angulis posticis acute 

 incisis, vix subtilissme punctulato, elytris punctatis, mandibulis flavis. Long. -2. 



Lake Superior and Sta. Fe, more densely pubescent than the former, with broad 

 lateral margin to the thorax ; the antennae longer than the body, 3 rd joint hardly equal 

 to the 4 th . 



15 A. terminalis. Elongatus subdepressus dense punctatus breviter pubescens; 

 capite nigro, linea angusta lam, thorace latitudine longiore, rufo, basi subangustato 

 marginatoque, elytris parallelis fuscis basi late indeterminate testaceis, maculaque ro- 

 tundata ad trientem secundum testacea ; subtus niger, pedibus anteunisque testaceis. 

 Long. -10. Lake Superior and New York. 



16 A. difficilis. Elongatus fuscus, albido pubescens, capite thoraceque rufo-testaceis 

 illo disperse- punctato, spatio indistincto Ircvi, hoc capite vix angustiore, campanulato, 

 antice rotundato, pone medium angustato, versus basin cylindrico, dense minus sub- 

 tiliter punctato, basi marginata, elytris elongatis parallelis, minus subtiliter punctatis, 

 cum antennis pedibusque testaceis. Long. !. 



Variat, fascia fusca transversa ad elytrorum medium. 



17 A. scabriceps. Elongatus niger densius albido pubescens capite thoraceque con- 

 fertissime rugoso-punctatis, hoc capite vix angustiore, campanulato, antice rotundato, 

 pone medium angustato, basi cylindrico marginatoque, elytris punctatis, apice obsolete 

 rufescente, antennis piceo-testaceis. Long. !. 



