CERAMBYCID.E 



Rosalia Serv. 



The single species known from North America probably varies 

 as much, due to local conditions, as does the European alpina, and 

 judging from the number of names that have been given the latter 

 under the title "aberration," its plasticity must be exceptional. 

 I have noted two especially conspicuous variations of our funebris, 

 defined below, it being unnecessary to give very detailed descriptions, 

 as the primary scheme of structure and ornamentation is the same 

 in all. 



Elytral bands of pale pubescence narrowing outwardly; mandibles small; 

 antennae (cT) rather slender, not quite one-half longer than the 

 body, the last joint with the moderately demarcated apical process 

 distinctly tapering to the very narrowly obtuse apex. Length 26.0 

 mm.; width 8.0 mm. Southern Alaska to Oregon., .funebris Mots. 

 A Rather larger, otherwise similar, except that the mandibles are 

 notably larger and thicker, more irregular and more deeply im- 

 pressed on their dorsal surface, the antennae (cf) a little longer and 

 thicker, with the process of the last joint rather less tapering and 

 more broadly obtuse at tip, the last joint ( 9 ) as long as the pre- 

 ceding. Length 27.0-33.0 mm.; width 7.0-8.4 mm. California. 



mandibularis n. subsp. 



B Narrower in form, the prothorax similar but not so transverse; 

 antennae (9) shorter, not longer than the body, the last joint 

 shorter than the preceding; transverse pale bands of the elytra 

 much wider, the posterior not at all narrowed externally. Length 

 (9) 26.5 mm.; width 6.7 mm. New Mexico (Jemez Springs). 



acomana n. subsp. 



There is a good deal of variation in the maculation of the elytra; 

 in the Washington State and northern Oregon form, which I have 

 identified asftmebris, there is much more of the white ornamentation 

 than in mandibularis, where the bands are narrow; in one example, 

 from Tacoma, there is a long white humeral lunule, which sends off 

 a quadrate inner ramus, and the posterior band is connected with 

 the apical white patch on one elytron and nearly so on the other. 

 In acomana there is a humeral streak of white, which is connected 

 with the anterior band by a slender ramus, and the anterior band 

 is angularly produced posteriorly along the suture. But only 

 characters of a structural nature are employed in defining the above 

 subsidiary forms, which I think have more the nature of subspecies 

 than aberrations or ornamentation variants. 



