112 THE COCCIDAE 



Ipomoea, Thunbergia, Strobilanthus, Verbena, Achillea, 

 Salvia, Cuphea, Capsicum, Ageratum, Veronia, Gardenia, 

 Chrysanthemum, Lonicera, Citrus, tea, strawberry, to- 

 mato, etc. insignis Dougl. 



ee. Dorsal plates arranged in practically straight rows, paral- 

 lel, not divergent or farther apart on thorax, cephalic 

 dorsal plates thicker and longer tnan caudal; dorsal sur- 

 face of body naked except for two median rows of small 



dorsal plates and a little mealy powder. New Mexico 



monticola Ckll. 



dd. Body not exposed between two rows of dorsal plates; cephal- 

 ic dorsal plates thicker and longer than caudal. New Mex- 

 ico on Gutierrezia. nigrocincta Ckll. 



bb. Portion of dorsal surface of adult female not covered by plates of 

 wax much less in extent than covered area. 



c. Portion of dorsal surface of body of adult female exposed 

 limited to small portion caudad of dorsal plates; four large 

 caudal plates project caudad over ovisac; postanal plate much 



abbreviated. Mexico on Hymenoclea. sonorensis Ckll. 



cc. Portions of dorsal surface of body of adult female exposed 

 limited to narrow band-lie areas between dorsal and lateral 

 plates. 



d. Dorsal plates forming high, double, mesal crest of long erect 

 white plates; two caudal plates of each side very long and 

 curving down over sides of ovisac; body pale pea-green. 



New Mexico on Garrya. garryae Ckll. 



dd. Dorsal plates not forming high white mesal crest. 



e. Caudal plates of each side two or three times as long as 

 other lateral plates and strongly divergent; head plates 

 fused and projecting over head as strongly divergent pro- 

 jections. Jamaica, Trinidad, British Guiana, Brazil on 



Capsicum, Croton, Citrus, Sanchezia. praelonga Dougl. 



ee. Caudal plates of each side not greatly elongated and di- 

 vergent; head plates not strongly divergent projections, 

 f. Dorsal surface with deep mesal furrow between two 

 rows of dorsal plates; head plates prolonged over head, 

 not divergent or greatly produced; caudal plates sub- 

 equal in length. Argentine Republic on Compositae(?). 



ultima Ckll. 



ff. Dorsal surface not with deep mesal furrow between two 

 rows of dorsal plates; head plates not prolonged over 

 head; caudal plates longest; caudal dorsal plates widest; 

 ovisac very long; antennae with third segment longest 

 or third and eighth subequal. New Mexico, California 

 on grass. graminis Ckll. 



aa. Dorsal surface of body not exposed, completely concealed by plates 

 of wax. 



b. Dorsal surface not with row of intercalary plates on each side. 



