774 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



between its base and its neck; abdomen greenish, polished, with 

 cupreous reflections. 



Male: length 1.2 mm.; greenish without cupreous stains, legs 

 except coxae yellowish, otherwise nearly as in the female. 



Parasitic on the brown tail moth (Euproctis chrysorrhoea) , 

 and introduced from the Old World into Massachusetts. Re- 

 covered from winter nests taken at Hartford in 1913 and 1915. 



(For other species of Pteromalus see pages 471-478.) 



APHELINID^. 



Prospaltella Ashmead. 



Prospalta Howard (preoccupied). 



Related to Coccophagus Westwood, from which it differs in 



the marginal vein being much shorter than the submarginal 



vein. 



(For a characterization of this genus, see Insect Life, Vol. 

 vii, page 6, and for key to other species see Annals of the Ento- 

 mological Society of America, Vol. i, page 281.) 



P. perniciosi Tower. 



An important parasite of the San Jose scale (Aspidiotus per- 

 niciosus) . The original description of this species may be found 

 in Annals of the Entomological Society of America, Vol. vi, page 

 125, and is as follows : — 



"Female: length, 0.61 mm.; expanse, 1.73 mm.; greatest 

 width of fore wing, 0.25 mm. General color of living specimens 

 black with the mesoscutellum showing as a prominent light dot. 

 In xylol-balsam mounts the head and central portions of the 

 thorax are light brown. Head: vertex yellowish brown; occiput 

 dark; ocelli dark; eyes black and hairy, the hairs about as long 

 as the diameter of a facet. Antenna: brownish yellow; bulb 

 twice as long as wide, cylindrical and nearly hyaline; scape 

 nearly five times as long as wide, nearly hyaline at each end, 

 more or less cylindrical to spindle-shaped ; pedicle slightly longer 

 than wide, narrow at its base, widest well toward its tip, its inner 

 side much farther from the axis of the antenna than its outer 

 side; first funicle segment connected with pedicle by a narrow 

 somewhat elongate stalk, which is quite hyaline; this segment a 

 trifle more than half the length of the next and irregular in out- 

 line ; second and third segments of the funicle nearly equal in size 



