1902.] NATURAL SCIEXCES OF PHILADELPHIA. 283 



Subf:. DIALETJRODES n. subs. 



Type J., citri; also iucludes ^. eur/enice and A. aurantii. Adult 

 with second joint of antennre much longer than first ; eyes not com- 

 pletely divided; male abdomen with a large ventral waxy tuft on 

 emerging from pupa. Pupa not fringed; vasiform orifice broad, 

 lingua short ; three radiating grooves, one posterior and two antero- 

 lateral, terminating peripherally in a star-shaped opening. 



Sub.ir. TRIALEURODES n. subs. 



Type A. ^;e?"^o>jrff/. This name is proposed for an American 

 series (including pergandei, variabilis, fitchi, ruborum, vittata, 

 erigerontis, etc.) in which the apical segment of the lingua is 

 strongly crenulated. The posterior end of the vasiform orifice is 

 often bifid. 



SubK. TETRALETJRODES n. subg. 



Type A. ^yerileuca. Pupa extremely dense, black, with a fringe 

 of radiating waxy ribbons. Vasiform orifice shovel-shaped. 

 Margin of pupa very regularly and strongly beaded; dorsum 

 keeled. Includes also A. melavops. Occurs on the upper side of 

 leaves of Quercus. Southern California and Texas. 



EXPLANATION OF PLATE XV. 



Fior. l.—Aleurodicus ornatxs (imago). — A. Venation of upper wing. 

 B. Claw. C. Margin of wing. 



Fig. 2. — Aleurodicus jamaicensis. — A. V.asiform orifice, etc. B. mar- 

 gin of pupa. C. Side view of pupa. I). Abilomiual pore. 



Fig. 6. — Aleurodicus mirahilis. — Diagram of vasiform orifice, etc. 



Fig. 4. — Aleurodicus mirahilis. — A. I'upa, sliowing involuted margin, 

 B. Edge of pupa (involuted). C. Abdominal pore. 



Fig. 0. — Aleyrodes gelatinosa. — Margin of pupa. 



Fig. 6. — Aleyrodes vinsonioides. — Margin of pupa. 



Fig. 7. — Aleyrodes variabilis. — Vasiform orifice, etc. 



Y\g. S.— Aleyrodes berbericola. —A. ]\[argiu of pupa. B. Margin of 

 wing. 



Fig. 9. — Aleyrodes gelatinosa.— Ilgg from body of female. 



