48 
A. gaurotoides Cay., is a black, rubbed female; pacifica Csy., a male 
with much yellow on the elytra; trajecta Csy., a brightly coloured male; 
vivarium Csy., a male; all apparently within the limits of this species. 
Three hundred and fifty specimens have been examined from Cali- 
fornia, Oregon, Arizona, Colorado, Kansas, Montana, British Columbia, 
Alberta, Manitoba, North West Territories, and Ontario. In literature, 
New Hampshire, Idaho, Wyoming, Washington, Nevada, Kansas, New 
Mexico, and Saskatchewan are mentioned. 
Host plants: Pinus ponderosa (Hopping), probably other pines. 
Type locality: Oregon. 
(9) Anoplodera flaviventris Sch., 1908, Bull. Brook. Inst., 1, p. 342. 
Length 10 mm. The type has the elytra black, but a specimen before 
us (kindly loaned by Mr. H. W. Wenzel), although agreeing with the 
original description in every other particular, has the elytra banded black 
and yellow, much as in some forms of instabilis Hald. and the “flavous” 
parts are more or less reddish. Mr. Wenzel’s specimen is a female from the 
same locality as the type. 
We have also seen seven specimens, apparently the same species, four 
males and three females, from the Chiriehua mountains, Arizona. Two 
males and two females were maculate, and two males and one female had 
the elytra entirely black. All had the flavous legs and abdomen except 
one male, which had the legs and abdomen a very dark brown, almost 
black. One female of the same species from Cochise county, Arizona, 
is entirely black. 
If flaviventris Schaeffer is to be separated from instabilis Hald., the 
principal distinction will apparently be the short and very wide pronotum 
with the hind angles unusually prominent and the pronotal pubescence 
short and stout. The series we have placed under the name flaviventris has 
the colour throughout dark piceous to nearly black, but we have also a 
series of maculate specimens with a very wide pronotum and the vestiture 
of varying length. The flavous abdomen is common, although not in- 
variable in the flaviventris series; but it is also found, less commonly, in the 
intergrading series and in typical instabilis. 
Original description of Anoplodera flaviventris Schaef . : 
“Form of instabilis, black, moderately shining, antennse, palpi, legs, and abdomen 
flavous. Head densely punctate, median line distinctly impressed; pubescence sparse, 
behind the eyes more evident on each side and pale. Thorax transverse, convex, broadly, 
transversely impressed at base, angulate at sides at slightly more than apical third, from 
the angulation to the basal angles arcuate-emarginate, basal angles divergent and prom- 
inent; base strongly margined; surface densely punctate; median line not strongly im- 
pressed; on each side, nearer the margin than the median line a shallow, round impression; 
E ubescenee pale and not very evident. Elytra slightly wider than the thorax at base; 
umeri rounded; sides gradually narrowing to apex; apices obtusely pointed; surface less 
densely punctate than the prothorax and covered with very short, dark pubescence. 
Metasternum rather densely punctate, abdomen sparsely punctate. Legs slender, first 
joints of hind tarsi as long as the next three and clothed with a few stiff, dark hairs. Length, 
head deflexedj 10 mm.; width across the base, 4-75 mm.” 
Huachuca Mountains, Arizona 
I captured only a single female of this species near Carrs peak, on flowers at an eleva- 
tion of about 8,000 feet. In form it is closely allied to instabilis, but readily separated 
from possible black forms of that species by the flavous legs and abdomen. Casey’s 
guarotoides is an entirely black species with the scutellum truncate behind.” 
