198 UNIVERSITY OF COLORADO STUDIES 



Series I 

 (All ours have well-developed antennae and legs) 



Ovisac largely covering the insect Lichtensia, signoret 



Ovisac posterior to the insect, not covering it ....... 1 



1. Body of female more or less chitinous, becoming hard, and without dorsal patches 



of secretion ....... Pulvinaria, targioni-tozzetti 



Body of female soft, not chitinous; dorsum with patches of white secretion . 



Philephedra, ckll. 



LICHTENSIA, signoret 

 On Lycium torreyi in the Mesilla Valley, N. M.; antennae 8-jointed; margin with 



spines .......■••• lycn, ckll. 



PHILEPHEDRA, cockerell 



On Ephedra in the Mesilla Valley, N. M.; body pink in front, greenish on dorsum, 



with some black specks; antennae 8-jointed .... ephedra*, ckll. 



PULVINARIA, targioni-tozzetti 



Ovisac large, convex, adhering to whatever touches it . . . . - • 1 



Ovisac parallel-sided, firmer, not very convex, not adhering to objects touching it, 



except of course to the twig or leaf on which it rests ..... 3 



1. Large; female when mounted on slide 10 mm. long and wide. (On osage-orange, 



Mesilla Valley, N. M.) . . . . . maclura (kennicott) 



Smaller; female on slide 5 to 8 mm. long ....... 2 



2. Antennae 7 -jointed, joint 3 always the longest, but 4 nearly as long (on Celtis 



in the Pecos Valley, N. M.) tinsleyi, king 



Antennae 8-jointed (Colorado and New Mexico, on maple, boxelder, tamarisk, 



e t c .) . . . . . . . . innumerabilis (rathvon) 



Antennae 8-jointed; similar to the last, but some slight differences in antennae; 



hair on first joint much longer than in innumerabilis (Colorado, on Betula) 



. innumerabilis betheli, king 



3. On peach trees in New Mexico amygdali, ckll. 



On low-growing native Compositae ....•••• 4 



4. On Chrysothamnus in Colorado; antennae 8-jointed . . bigelovia, ckll. 

 A closely allied form on a plant believed to be Hymenoxys in the Organ Mts., N. 



M.; female marbled with ochreous and black . bigelovice marmorata (ckll.) 



Series II 

 Covering of female consisting of wax ..... Ceroplastes, GRAY 



Covering of female glassy, brittle Ceroplastodes, ckll. 



CEROPLASTES, gray 

 Wax white or whitish; on Atriplex canescens .... irregularis, ckll. 



Wax very dark madder red or pinkish-brown, with the short dorsal line of secretion 

 showing up conspicuously white ; on the same plant, southern New Mexico 



irregularis rubidus, ckll. 



