148 LE CONTE.— LONGICORN COLEOPTERA 



The species of this genus have a flat rectangular forehead ; the gense are very 

 prominent : the elytra of the males (as in Ptychodes) are regularly narrowed from the 

 humeri to the apex. 



1. M. TiTiLLATOR, fusco-tcstaceus, cinereo ochraceoque variegatus, thorace confertim rugose punctato, medio 

 sublaevi, eljtris grosse punctatis, sutura spina armata, antennis fuscis, vel testaceis. Long. -55 — 1-15. 

 Hald. 51. 



% Lamia titillator Fabr. Ent. Syst. 2, 279 : Syst. El. 2, 295. 

 Ceramhyx titillator 01. 67, 15, 109. 



9 Lamia dentator Fabr. Ent. Syst 2, 278 : Syst. El. 2, 294. 

 Ceramhyx carolinensis 01. 57, 12, 88. 



I suspect Dr. Harris has mentioned another species under this name : yet the 

 figures of the older authors so exactly represent this one, that I think there can be 

 little doubt of the truth of my determination. Olivier's C. carolinensis very obviously 

 is the female of his C. titillator : the fuscous color of the antennae, which are not 

 annulate in the female, distinguish it very easily from all the following. It is 

 common in the Southern States. 



2. M. SCUTELLATUS, aeneo-niger, nitidus thorace transversira dense rugose punctato, elytris confluenter 



punctatis, maculis nonnuUis indistinctis cinereo-pubescentibus scutello albo-pubesoento : antennis nigris, 



feminae cinereo annulatis. Long. -70 — "95. 

 Hald. 51. 



Ceramhyx scutellatus Say. Long's Exp. 2, 289. 

 Monochamus resutor Kirby. F. Bor. Am. 4, 167. 



Very abundant at Lake Superior; found also in Maine. Mr, Kirby says the 

 antennse of the female are not annulated, but this species otherwise agrees so exactly 

 with his description, that I imagine he must have had a rubbed specimen. This 

 species (and probably all the others) lives in pine trees. 



3. M. MARMORATUS, piceus, thorace confertim grosse rugose punctato, spinis dense ochreo-pubescentibus, 



elytris fusco cinereoque variegatis, punctatis, punctis versus basin confluentibus, sutura subspinosa, 



scutello albicante, antennis nigris, feminae cinereo annulatis. Long. -90. 

 M. maculosus Hald. 51. 

 if. mutator Lee. Agassiz Lake Sup. 234. 

 Lamia marmorata Randall. Bost. Journ. Nat. Hist. 2, 19. (1889.) 



Lake Superior ; common. The elytra are quite scabrous at the base from elevated 

 points. This species strongly resembles the next, but is much less pubescent ; the 

 sculpture of the thorax at once distinguishes it. 



4. M. CONFUSOR, nigro-testaceus, ciaereo-pubescens, nigro punctatus, thorace parce minus distincte punctato, 



spinis densius pubescentibus, elytris punctatis maculis oblongis nigro-pubescentibus, scutello albo 

 pubescente, antennis testaceis, feminae cinereo-annulatis. Long. 1-1. 

 ? Kirby, Fauna Bor. Am. 168. 



Saratoga; abundant. Mr. Thomson. The smoothness of the thorax at once 



