1913] 



North American Species of Megastigmus. 



163 



Megastigmus lasiocarpae n. sp. 



Female. — Length, 3.7 mm.; abdomen, 1.5 mm.; ovipositor, 3. mm. 



Thorax and abdomen black. Face and partial ring around eye 

 yellow, a pair of large triangular brownish spots on the face; rest of 

 head black. An elongate light yellow spot on the side of the prothorax. 

 Transverse lateral spots on the sides of abdomen yellow. Head finely 

 rugulose with the lines radiating from the mouth and ocelli. Thorax 

 transversely finely rugulose and shingled. 



Antennfe brownish black, scape and pedicel yellow beneath. Legs 

 brownish, posterior femora black except at tip. Anterior coxae yellow, 

 black at base, the other coxas black. Wings hyaHne; stigmal club not 

 surrounded by a clouded area. 



Fig. 6. Megastigmus lasiocarpcB. 



Male. — Length, 2.4 mm. ; abdomen, 1 mm. 



Vertex, upper part of occiput and front half way to base of antennas, 

 black; face, cheeks, lower occiput and a narrow spot along upper eye- 

 margin, yellow. Whole dorsal aspect of thorax black; the yellow spot 

 on side of prothorax is larger than in female. Abdomen black. 



Antennse brownish, scape yellow in front, pedicel nearly black 

 above. Front coxag yellow, middle coxse yellow, blackish at base, hind 

 coxas black. Legs yellowish, suffused with brownish distally; posterior 

 femora brownish on outer surface. Stigmal club darker than in female 

 and more nearly circular. 



Described from 2 9 1 cf reared from seeds of Abies lasiocarpa 

 kindly sent me by O. S. Mackelfresh, from Rye, Colorado, 5 

 June, 1909. 



Megastigmus spermotrophus Wachtl. 



Megastigmus spermotrophus Wachtl. Wien. Ent. Zeit., XII, p. 24. 1893. 

 Megastigmus piniis Parfitt. Zoologist, XV, p. 5731. 1857 (Male only). 

 Megastigmus spermotrophus MacDougall. Trans. Roy. Arbor. Soc, XIX, pp. 



52-65. 1906. Figure and account of habits. 

 Megastigmus spermotrophus Crosby. Cornell Exp. Sta. Bull. 265. pp. 379-380. Figs. 



85-89. 1909. 

 Megastigmus spermotrophus Rohwer. U. S. Bur. Ent., Tech. Bull. 20, pt. VI, p. 



160. 1913. 



