436 THE CANADIAN ENTOMOLOGIST. 



which are brownish black, but lighter at the tip. Wings hyaline. 

 Abdomen shining black, sometimes with three indistinct yellow 

 spots on the sides. Ovipositor brownish black. 



Male. — Length 2.5 mm.; abdomen 1 mm. Vertex and occiput 

 black; face, cheeks and upper portion of front, yellow; portion 

 bordering the upper posterior angle of the eye brownish. Whole 

 dorsal aspect of thorax black. The brownish spot on the sides of 

 the prothorax somewhat rectangular, and more distinct than in the 

 female. Antenna; brownish, scape yellow. Front coxae yellow; 

 middle coxae brownish, black towards base; hind coxae black. 

 Legs yellowish. Stigmal club somewhat truncate behind. Pr.o- 

 podeum finely reticulate-punctate with an indistinct longitudinal 

 median carina. Abdomen brownish black, lighter beneath. 



Larva. — Length 2.1 mm.; width 9 mm. Colour dull white, 

 middle segments a little darker. The mandibles are brownish, and 

 armed with four teeth (Fig. 6). Supporting the mandibles is a 

 thick fleshy labium, thicker on the caudal end. The larva is 

 sparsely clothed with short setae. 



Egg. — The egg as obtained by dissection of the female is 

 white, smooth, and spindle-shaped, with a long pedicel at one end, 

 and a vestige of one at the opposite end. Length of body of egg 

 .22 mm.; tail-like process .44 mm.; vestige .031 mm. 



Described from 15 females and 12 males, Ithaca, N. Y., July 

 17, 1914. Types deposited in the Cornell University collection. 



Specimens were compared with Megastigmns atedins Walker 

 in the Oxford Museum by C. O. Waterhouse. The latter is 4 mm. 

 long; the striae of the thorax are coarser, and the stigmal club is 

 nearly circular. Specimens were also compared with Megastigmas 

 japonicus and Megastigmus koebelei Ashmead, by J. C. Crawford in 

 the U. S. National Museum. M. japonicus is entirely yellow. 

 The striae of the mesonotum are coarser and straight. They are 

 much more strongly elevated than in laricis, and continue across 

 the parap~oidal areas. M. koebelei has the dorsum of the thorax 

 green, with the transverse striae much coarser. The parapsoidal 

 furrows are indistinct, and the apical part of the scutellum has a 

 finer sculpture than the basal part. 



