132 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



the conclusion that they had issued from Aleyrodids, and their juxta- 

 position and the known habits of the genus confirm this conclusion. 



The genus Prospaltella is as a rule parasitic upon Diaspine scale 

 insects, but certain species have been bred from Aleyrodids as follows : 

 P. tristis Zehnt. was reared from Aleyrodes bergi Sign.; P. conjugata 

 Masi was reared from Aleyrodes brassiccs Walk.; P. quercicola How. 

 was reared from Aleyrodes gelatinosus Ckll.; P. citrella How. was 

 reared from Aleyrodes coronatus Quaintance, and P. hrunnea was 

 reared from Aleyrodes sp. (on climbing vine). See "A Key to the 

 Species of Prospaltella, with Table of Hosts," etc., by L. 0. Howard, 

 Annals Entomological Society of America, Vol. I, 1908, pp. 281-284. 



With the reasonable certainty that this insect is a true parasite of 

 the Florida white fly, it becomes important to give it a name, and the 

 following description is therefore presented. 



Subfamily Aphelinin^ Howard 

 Genus Prospaltella Ashmead, 1904. 



Prospalta Howard, 1894 (preoccupied). 



Prospaltella lahorensis, n. sp. Female. — Length, 0.54 mm.; expanse, 1.42 mm.; 

 greatest width of forewing, 0.25 mm. Antennse long, not clavate; scape long, 

 slender; pedicel nearly as broad as long; first funicle joint somewhat longer than 

 second ; second and third subequal ; club equal in length to second and third funicle 

 joints together; terminal segment of club slightly longer than middle segment, basal 

 segment again slightly shorter. Fore wings broad, with moderately long bordering 

 cilia; disc uniformly covered with minute cilia; stigmal vein rounded below, its 

 anterior margin for a time parallel with costa; marginal vein faintly indicated, its 

 base joining stigmal in an acute angle. (In this respect this species differs from all 

 other known species of its genus.) General color light yellow; all legs pallid; eyes, 

 dark; ocelli, coral-red; antennal club dusky; wings hyaline, wing veins dusky. 



Male. — Of practically the same size and structure as the female, but differing in 

 color. The coloration closely resembles that of Aspidiotipiiafjus ciirinus, to which it 

 bears a superficial resemblance; pronotum, brownish; mesonotum, orange-yellow; 

 metanotum and epimerum, brownish; abdomen dark brown except at base and tip 

 where it is lighter; hind femora dusky at tips; wing veins distinctly fuscous, con- 

 siderably darker than in female. 



Described from two females and three males found at Washington 

 on citrus leaves, close to specimens of Aleyrodes citri R. & H. con- 

 taining exit holes of some parasite of this approximate size. Col- 

 lected at Lahore, India, by R. S. Woglum, November, 1910. 



Type No. 12169, U. S. N. M. 



