54 BULLETIN NO. 3, DIVISION OF ENTOMOLOGY. 
COSSUS ANGREZI Bailey. 
(Plate II, Fig. 6.) 
We repeat the original description of this species, given in Papilio for 
June, 1882 (Vol. II, No. 6, p. 93): 
COSSUS ANGREZL n.s.Q9. Head somewhat narrow on the vertex. Collar and head 
yellowish gray, thorax black; the edges of the tegul« shaded with yellowish gray. 
Fore wings with a nearly white ground, shaded with black, and with black reticula- 
tions. Hind wings yellowish gray, mottled with blackish outwardly. The fore wings 
have the costal edge pale, marked with black; the black shading obtains on costa at 
apical third, and over the whole wing at terminal third, extending obliquely down- 
wards and inwards; there are a series of interspacial longitudinal black streaks be- 
fore the margin, more or less defined. Fringes whitish, dotted with black opposite 
the ends of the veins, which latter conversely are whitish. Thorax shaded with yel- 
lowish gray behind. Abdomen dark gray. Beneath the wings repeat the markings 
very distinctly, owing to the strong contrast of the pale ground color with the black 
markings. Expanse, 82™™. 19. Wells, Elko Co., Nevada. From the late Mrs. 
Caroline Chase. Type, coll. James 8, Bailey. 
This I believe is a true Cossus, although the ¢ is not known to me. 
The shape of the wing is as in centerensis. The structure is that of 
Cossus, and not of Prionoxystus. The thorax is subquadrate, the vest- 
iture short and thick. The interspacial black dashes along the prima- 
ries subterminally distinguish it specifieally. The pre-apical transverse 
black streak or line resembles that of C. centerensis. The hind wings 
are faintly reticulated. The ground color is a yellowish white. The 
biack blotches on fore wings of robinie are here wanting, while there is 
a diffuse discal shade blotch, another above and beyond it on costa, and . 
the wing shows a wide, soft, blackish shading, obliquely edged inwardly, 
and covering the outer portions of the wing. Except the antenne my 
type is perfect. Beneath it is strongly marked, and reminds one of 
C. robinie Peck, but the shape of the wing is not like that species. 
The thorax is black above, not gray with black stripe on tegule, and 
the collar is discolorous, pale yellowish gray. This species ought to be 
recognizable. The shape of the thorax is like Cossus, as is the vestiture, 
so that I am not prepared to find that the male has the peculiarities of 
C. robinie and querciperda Fitch. I hope Western collectors will solve 
the question. But I cannot regard angrezi as having anything to do 
with the question of a Western representative of robinia. From Her- 
rich Schaefer’s figure, and what has been published, I believe that robi- 
nic is found across the continent. 
PRIONOXYSTUS ROBINILZ Peck. 
I have a female with extended ovipositor. We have probably only 
one species, reaching from California to the East, and this is phytophagie, 
feeding on the oak, willow, as well as the locust and other trees. No 
difference by which these forms can be separated is appreciable. The 
female is redesecribed as crepara by Dr. Harris. The insect was common 
in 1882 in different localities in New York State. 
