334 Mr. T. D. A. Cockerell on new and 
Dactylopius neomexicanus (‘Tinsley). 
Described as a variety of D. Kingit, but it is probably a 
valid species. 
Las Vegas, N. M., Jan. 6, 1901, on roots of grass; in 
ovisacs and producing young. 
During the summer the species is tended by Lastus ameri- 
canus, but in winter the ants go far underground, and leave it 
to its own devices. Its habit of reproducing during the 
winter must be an advantageous one, since it is then free 
from the attacks of Chalcidid parasites. The Las Vegas 
females are rather large, 3 millim. long, colour pale brown, 
varying to pale grey and pale pink. Antennal formula 
8 (12) 37 (456). 
Phenacoccus calcitectus, sp. n. 
?.—About 3 millim. long, at least 4 with the secretion. 
Wholly covered by a dense chalk-white secretion, which 
gives it the appearance of an Orthezia; this secretion is 
seomented and forms a broad low ridge down the middle of 
the body, with two ridges on each side of it; in addition, 
thore is a fringe consisting of thick plates of secretion, very 
broad anteriorly, becoming narrow and elongated behind. 
@.—Boiled in caustic potash gives a very slight pink 
colour. Legs and antenne very dark brown; claw with a 
denticle on inner side; only bristles in place cf digitules ; 
tarsal bristles very short, about 20 w long, about a dozen in 
a row; bristles of anal ring six, about 230 w long; body 
densely beset with small round glands and small brown 
spines, which make it look almost like a hedgehog; each 
segment has a large brown patch on each side. Antennal 
formula 932541 (68) 7, withsome variation. Measurements 
in w#:—Antennal joints: (1) 84-120, (2) 120-130, (3) 135- 
160, (4) 99-150, (5) 99-140, (6) 72-78, (7) 66-72, (8) 78-81, 
(9) 144-170. Middle legs: coxa 300; femur + trochanter 600; 
tibia 600; tarsus 240; claw 80. 
g.—Leneth about 3 millim., filaments 9 millim. Grey, 
somewhat covered with white secretion; antenne and legs 
dark slate-colour; wings dusky, somewhat iridescent, with 
dark veins ; two long white caudal filaments. 
Hab. Beulah, N. M., about 8000 feet alt., July 27, 1900 
(T. D. A. & W. P. Cockerell), The females were found on 
the heads of grasses (Koelerta and Phleum), which they had 
climbed presumably to attract the males, which were flying 
around, ; 
P, calcitectus belongs to the group of P. yucee, but differs 
