HEMIPTERA OF COLORADO. 
125 
1 ort Collins. September 15th on Mentzelia nuda (Baker). 
! ^ ave a l- s o taken a very anomalous Aphid, for which I can give neither generic nor 
specific determination, forming a gall on the leaves of Arctostaphylos uva-ursi. Oneside 
of the leaf is turned hack and thickened for about half its length, thereby forming a 
smooth oblong gall about 10 mm. long and 3 mm. in diameter, which is often of a reddish 
color.. Only apterous individuals were observed. Length about 1.50-1.80 mm. Beak 
reaching the second coxae. Antennae six-jointed, the third joint longest, the sixth 
second in length, all of the joints beyond the third with many fine annulations, sparsely 
hairy, the antennae would reach a little beyond the base of the wings. Honey tubes 
very small, broader than long, scarcely elevated above the abdomen. Legs short. Body 
elongate, dull green, legs a little darker. Individuals examined later in the season, 
which were evidedently pupae of winged forms, have the body more ovate with numerous 
short hairs. Antennae distinctly seven jointed and about one-half as long as the body. 
Honey tubes somewhat longer.” 
Foothills five miles west of Fort Collins, July 19th 
(Cowen). 
Aleyrodes pyrolae n. sp. 
Pupal scale. Length 1.25 mm.; width 1 mm. Color very pale straw yellow, some¬ 
what darker toward the center. Elliptical, slightly broader at the center. Margin en¬ 
tire, without fringe. Within the margin all around, finely and densely wrinkled, the 
wrinkles extending radially inward about half way to the median 
line along the sides. Central portion with ten more or less well 
defined horizontal folds. Folds on anterior half, four in number, 
first semiinn ate, remainder linear. Line separating first and second 
folds obtusely angled in center, the angle directed caudad; line 
separating second and third straight; line separating third and 
fourth obtusely angled cephalad. Folds on posteri )r half of dor¬ 
sum linear and six in number, the line separating the first and 
second folds with extremities bent cephalad; last three folds bent 
caudad at extremities. Anal plate darker than surrounding 
surface, unequally triangular, the longest angle directed caudad. 
Described from several scales of different 
ages. Four-mile Hill eight miles south of 
Steamboat Springs, July 19th on Pyrola rotundifolia 
(Baker). 
Coccus cacti L. var. confusus Ckll. Det. Cockerell. 
Probably this species (Acanthococcus confusus) in the midalpine of Custer 
County (Cockerell, 10). 
Manitou, September 27th on Opuntia (Gillette). 
Rhizococcus n. sp. 
Under a rock at West Cliff, April 23d. Naked, pyriform, 2.25 mm long, 
dull lilac, legs clear red-brown, antennae reddish-brown. Caudal filaments 
short, but distinct (Cockereli, 10). 
Dactylopius citri Boisd. Det. Baker. 
On Habrothamnus and Solanum jasimoides in the college 
greenhouse, September 10th (Baker). 
