334: Mr. T. D. A. Cockerell on neio and 



Dactijlopius neomexicanus (Tinsley). 



Described as a variety of D. Kingii, 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 sunimer the species is tended by Laaius 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 (1 2) 3 7 (4 5 6). 



Fhenacoccus 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 

 segmented and forms a broad low ridge down the middle of 

 the body, with two ridges on each side of it ; in addition, 

 there 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 antennae very dark brown; claw with a 

 denticle on inner side ; only bristles in place of digitules ; 

 tarsal bristles veiy short, about 20 fju long, about a dozen in 

 a row; bristles of anal ring six, about 230 fi 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 9 3 2 5 4 I (6 8) 7, with some variation. Measurements 

 in ytx:— 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. 



(J. — Length about 3 millim., filaments 9 millim. Grey, 

 somewhat covered with white secretion; antennaj and legs 

 dark slate- colour ; wings dusky, somewhat iridescent, with 

 dark veins ; two long white caudal filaments. 



Bab. 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 {Koeleria and Phleurn)^ which they had 

 climbed presumably to attract the males, which were flying 

 around. 



P. calcitectus belongs to the group of P. yuccce, but differs 



