64 ENTOMOLOGICAL SOCIETY 



of this genus seem to be the most numerous and important of 

 the parasites of Aleyrodidse. 



Encarsia variegata, n. sp. 



Female. Length, 0.64 mm.; expanse, 1.52 mm.; greatest width of 

 fore wing 0.28 mm. Eyes faintly hairy; head broad, eyes well sep- 

 arated; ocelli large, situated at angles of a right-angled triangle; an- 

 tennse nearly naked; first funicle joint slightly shorter than pedicel, 

 which is slightly swollen; second funicle joint longest, joints 3 and 4 

 and first joint of club subequal in length and each shorter than second 

 funicle joint; terminal joint of club slightly shorter than basal joint. 

 All tarsi S-jointed. Ovipositor well extruded. Color: Head and 

 thorax brown, except the mesoscutellum which is almost entirely silvery 

 white; antennal scape and all legs pallid and nearly translucent; 

 flagellum of antennae yellowish; eyes dark red; ocelli red, not so dark 

 as eyes; abdomen yellow, brighter above, but bordered on both sides 

 and behind with a brown band. Wings perfectly hyaline, with a densely 

 ciliate disc. 



Type. No. 11707, U. S. National Museum. Described 

 from 2 female specimens reared by Dr. A. W. Morrill at 

 Orlando, Fla., June 25, 1907, from Aleurodicus persece on 

 lemon leaves. It produces a curious dimorphism in its hosts, 

 according to Doctor Merrill's notes. Slide mounts sent by 

 Doctor Morrill to Washington show that a single pupa of the 

 parasite almost entirely fills the body of the host. 



Genus ERETMOCERUS Haldeman. 



Eretmocerus Hald., Amer. Journ. Science, Vol. ix, pp. no, in, May, 

 1850. 



Doctor Haldeman, in the article just cited, describes among 

 other things Aleyrodes abutilonea and A. corni and erects the 

 new genus Amitus to contain A. aleurodinis, a parasite of the 

 larvae of Aleyrodes corni "of which it destroys a great many." 

 His new genus Eretmocerus, to contain E. corni, n. sp., was 

 based upon two mutilated females reared with this Amitus. 

 He suggested that the Eretmocerus may possibly be parasitic 

 in the body of the Amitus, making it a hyperparasite. Neither 

 genus nor species was refound until 1895, when the writer 

 described Eretmocerus calif ornicus (Tech. Ser. i, U. S. Dept. 

 Agric., Div. Ent., Revision of the Aphelininse of N. A., pp. 

 1 6, 17, figs, i and 3) from both sexes. This description was 

 drawn up from many male and female specimens reared in 

 June and October from an Aleyrodes on Quercus agrifolm at 

 Los Angeles, Cal. by D. Wy Coquillett. Mr. Coquillett ap- 

 parently reared nothing else from the Aleyrodes on this par- 



