194 UNIVERSITY OF COLORADO STUDIES 



On Heliantlius, Pluchea, and Phacelia, Mesilla Valley, New Mexico; caudal and 

 lateral filaments prominent; a posterior cottony ovisac, about 5 mm. long; second 

 antennal joint longer than third ..... helianthi (ckll.) 



In nests of the ant Solenopsis geminata, about the roots of Boerhaavia and Kallstrcemia, 

 also on roots of Atriplex canescens, in the Mesilla Valley, N. M.; close to P. 

 helianthi, but caudal and lateral filaments not prominent, antennae a little 

 different, and ovisac much less compact .... solenopsis, tinsley 



On Picea pungens in Colorado; extremely small, adult female about 1 mm. long; 



ovisac without definite shape ...... minimus, tinsley 



With the ant Lasius niger at 8,000 ft. in New Mexico; small, female about 2 mm. long, 



pale salmon-pink, with short marginal cottony tassels riper sioides, w. & T. CKLL. 



On roots of Rubus strigosus at 8,000 ft. in New Mexico; hemispherical, with the form 



of a half-pea, pale pinkish, with no cottony tassels . . rubivorus, CKLL. 



On violets in the mountains of New Mexico; about 2\ mm. long, brownish olivaceous, 

 without lateral tassels; remarkable for the very thick hind tibae; second anten- 

 nal joint longer than third ....... wilmattce, CKLL 



CEROPUTO, sulc. 



Female about 3 mm. long, at least 4 with the secretion; wholly covered by a dense 

 chalk-white secretion, which gives it the appearance of an Orthezia; male grey, 

 wings dusky, somewhat iridescent, abdomen with two long white filaments (New 

 Mexico, at 8,000 ft., on grasses, Koeleria and Phleum) . . calcitectus (ckll.) 



Female about 4 mm. long, almost white, with a faint greenish tinge, covered with 

 wool-like white secretion; posterior lamellae not at all prolonged (in calcitectus 

 they form two tails); claw with denticle on inner side (in nests of Lasius 

 inter jectus under rocks, Las Vegas, N. M.; also found at Boulder, Colo.) 



. lasiorum, ckll 



PSEUDOCOCCUS, westwood (Trechocorys, Curtis) 



Introduced species, found only on indoor plants ...... 1 



Native species, found on native plants (rarely on plants cultivated in the field) . . 2 



1. Wth short cottony tassels all round the body; caudal tassels not long (on various 



plants) citri, (risso.) 



With slender cottony filaments all round the body; caudal filaments long (on 



various plants, especially ferns) . . . longispinus, (targioni-tozzetti) 

 Small, with dense secretion, forming four dorsal rows of protuberances, and a 

 marginal fringe ; antennae 7-jointed {citri and longispinus have 8-jointed antennae 

 and have not the dorsal protuberances) ; male, yellow (on indoor palms at Las 

 Vegas, N. M.) pseudonipce, (ckll.) 



2. On Dasylirion wheeleri in southern New Mexico, living at the bases of the leaves; 



about 4 mm. long, dark olivaceous, covered with white meal; no lateral tufts, 

 but sides very mealy; thick caudal tufts, not very long; antennae 8-jointed 



dasylirii (ckll.) 

 On Gutierrezia in New Mexico; small, slate-color, forming a long, firm, snow-white 

 ovisac, 4 to 6 mm. long and about 1 broad, on the leaves of the plant; antennae 

 8-jointed ......... gutierrezia (ckll.) 



