8 
In the genus Alosterna, the distal segments of the antennse bear 
irregular, elongate impressions at the bottom of which are a smaller number 
of closely placed punctures; and usually similar punctures may be seen 
scattered over the neighbouring surface of the segment. 
In some females of other genera, small pits occur irregularly on the 
distal segments of the antennse, and in some females of Anoplodera the distal 
segments bear a rather coarse pit on the underside at the distal extremity. 
Antennal Carina 
On the inner face of the antennal segments, in the genera Leptura and 
Acmaeops, particularly in the males, and in many other species of this 
group, there appears a distinct longitudinal carina, in some cases on only 
a few segments, in others on most of the segments from the fourth outward. 
This character could be utilized in distinguishing some species. 
Biology 
Very little is known of the biology of most of the species in this group. 
Probably most are wood borers during larval life. Some apparently breed 
in many species of trees, rarely in both coniferous and deciduous; some are 
confined to one or to a few tree species and many prefer decaying wood. 
Very few, such as Anoplodera nitens Forst., breed in living trees (Craighead). 
Adults of many species ( Anoplodera , Grammoptera, Typocerus , Leptura) 
are pollen feeders and are commonly found on flowers. 
The best published account of the biology of this group and its allies 
will be found in Craighead’s “North American Cerambycid Larvae,” 1923. 
Larval Groups 
In the work just cited, Dr. Craighead has given a valuable account of 
the larval characters in many species in this group. He has been good 
enough to prepare, for insertion here, a list indicating the generic grouping 
that is suggested by a study of larval characters alone. 
Larval Groups of Generic Value 
Group I — biforis Newm. 
Group II — subhmnata Rand. 
plagifera Lee. 
obliterata Hald. 
propinqua Bland. 
Group III — Uneola Say. 
Group IV — mutabilis Newm. 
aspera Lee. 
Group ' V — sphaericoUis Say. 
Group VI — bicolor Swed. 
famelica Newm. 
luteicornis Fab. 
acuminata Oliv. 
velutinus Oliv. 
proximo Say. 
chrysocoma Kby. 
nigrella Lee. 
exigua Newm. 
americana Hald. 
emarginata Fab. 
vagans Oliv. 
canadensis Oliv. 
rubrica Say. 
crasdpes Lee. 
valida Lee. 
vittata Oliv. 
nitens Forst. 
