IDENTIFICATION OF ROCKY MOUNTAIN COCCLDiE 1 99 



CEROPLASTODES, cockerell 

 On Parosela jormosa in the Mesilla Valley, N. M.; a small species with many little 



ridges or protuberances ........ dales, ckll. 



On Acacia in the Mesilla Valley, N. M acacia, ckll. 



Series III 

 Legs and antennae rudimentary or absent in adult female ..... 1 



Legs and antennae well developed in adult female ...... 2 



1 . Oval or suboval, not very convex, covered with a more or less distinct glassy film ; 



skin with large glands ...... Neolecanium, parrott 



Very convex, subglobular, with distinct pits, and no glassy film Toumeyella, ckll. 



Very convex, subreniform, brown, without pits or a glassy film .... 



Physokermes, targioni-tozzetti 



2. Flat or flatfish, never high convex; when moderately convex, then soft . . 3 

 High convex or hemispherical, hard when mature; color brown or black . . 4 



3. Very flat, distinctly divided into plates, color dark . . Eucalymnatus, ckll. 

 More convex, oval, color lighter, pale yellowish or greyish; soft . Coccus, linne. 



4. With an H-like mark on back consisting of ridges (absent in adult of one species) ; 



skin (seen under the microscope) with very conspicuous cell-like markings 



Saissetia, deplanches 

 With no H-like mark at any stage ; skin without such markings 



Eulecanium, cockerell 



NEOLECANIUM, parrott 

 Female about 4 mm. long, oval, moderately convex, reddish-brown, more or less cov- 

 ered with a thin fragile coat of glassy secretion. (Organ Mts., N. M., on 

 Mimosa and allied plants) ...... imbricatum (ckll.) 



TOUMEYELLA, cockerell 

 On mesquite (Prosopis) in southern New Mexico . . . mirabilis (ckll.) 



On Robinia neomexicana in the Organ Mts., N. M. . quadrifasciata (ckll.) 



PHYSOKERMES, targioni-tozzetti 

 On Picea at Manitou, Colorado; 7 mm. diameter . . . coloradensis, ckll. 



EUCALYMNATUS, cockerell 

 On hothouse palms only; antennae 8-jointed . . . perforatus (newstead) 



COCCUS, LINNE 



(Our species occur only on hothouse or indoor plants) 

 Female very small, never over 3 mm. long, fight yellow, antennae 7-jointed (on 



Pilea) .......... faveolus (ckll.) 



Female larger, 4 mm. long or more ......... 1 



1. Female elongate; antennae 8-jointed (on Fiats) . . . longulus (douglas) 



Female oval; antennae 7-jointed (on various plants) . . hesperidum , llnne 



