CERAMBYCIDAE. 267 



Spondylis upiforviis extends from Alaska to Lake Superior. 

 Scaphinus spheericollia is found in pine woods of the ISoutliern 

 States. 



A near approach is said to be made by Spondylis to Asenium; 

 but wiiile recognizing the resemblance, it appears to be a very 

 remote one, and the present form is rather to be considered that 

 which makes the closest approach to the next family, without, 

 however, actually belonging to it. 



Fam. LV.— CERAMBYCIDAE. 



Mentum variable, iu Prionida3 usually very transverse 

 and entirely corneous, in the othei's trapezoidal, more or 

 less transverse, frequently coriaceous at tip; ligula mem- 

 branous or coriaceous, sometimes (Prionina?, a few Ceram- 

 bycinie, and Methiini of Lainiinte) corneous ; labial palpi 

 3 -join ted. 



Maxillae with two lobes, clothed at the tip with bristles, 

 the inner one obsolete in Prionina3. 



Mandibles variable in form, sometimes (Mallodon % , Den- 

 drobias %) very long; usually curved and acute at tip, 

 rarely emarginate, or chisel-shaped (Distenia). 



Eyes usually transverse, most frequently deeply emargi- 

 nate, often divided, in which case the upper lobe is some- 

 times wanting (Tillomorpha, Spalacopsis) ; either finely or 

 coarsely granulated. 



Antenme variable in position, either in front of or between 

 the eyes, in the latter case frequently on large frontal eleva- 

 tions; usually long and slender, imbricate in Prionus (pec- 

 tinate in some foreign genera), subserrate or compressed in 

 a few forms, with sensitive surfaces differing in the sub- 

 families and tribes; usually 11-jointed, sometimes 12-25- 

 jointed (Prionus), very rarely 10-jointed (Mcthia, Dj^sphaga). 



Prothorax margined in Prioninas, not margined in any 

 others in our fauna; coxal cavities and coxse variable, 



Mesosternuni short, side pieces most frequently attaining 

 the coxae; sometimes (certain Cerambycinge and Lamiinae) 

 cut off by the apposition of the sternal pieces. 



Metasternum moderate, or long, short only in apterous 

 Lamias (Dorcadioides), and in some sul)terranean foreign 

 genera; e'pisterna variable; in many Cerambycinae with 

 an opening for the duct of a scent gland near the inner 

 hind ansle. 



