1913] North American Species of Megastigmus. 161 



Scape yellow below, black above; pedicel black above, paler at tip 

 beneath; rest of antennas brownish. Front coxae yellow; middle coxae 

 yellow in front, black behind; hind coxse black; legs yellowish, the 

 middle and hind pairs successively darker; a brownish stripe on outside 

 of posterior femora. Spines on posterior tibiae white and small. Wings 

 hyaline, no cloud surrounding stigmal club. 



Abdomen strongly compressed. Segments 2, 3 and 4 brownish 

 black above, polished; rest of abdomen yellow to \'ellowish brown 

 with a row of large brownish black spots on each side; segment 8 and 

 ventral keel brownish black. Ovipositor brown and strongly curved. 



Male. — Length, 3 mm.; abdomen, 1.3 to 1.9 mm. 



Head marked as in female but there are no brownish spots below 

 the insertion of the antenna. Thorax black; median orange-red area 

 lacking; prothorax has the sides yellow and there are two widely sep- 

 arated transverse dull yellowish spots near the posterior margin; 

 usually the outer angle of the scapulae has a yellow spot in front of the 

 tegulcB. Stigmal club surrounded by a very narrow clouded area. 



Abdomen shorter than in the female, somewhat compressed, seen 

 from above distinctly clavate, yellow beneath, black above, tip orange 

 yellow. 



Fig. 4. Megastigmus pinus. 



This species was first described by Parfitt from females 

 only reared from seeds of Picea bracteata, Pinus Abies nobilis, 

 and a new species of Thuja from California. In a later article 

 he described the male reared from another lot of seeds. Mr. 

 Charles O. Waterhouse of the British Museum has very kindly 

 sent me four specimens which he had carefully compared with 

 Parfitt's types. He also sent me three male specimens of If. 

 spermotrophus which he had found to agree with the types from 

 which Parfitt drew his description of the male of M. pinus. 

 Ashmead seems to have been misled by this description of the 

 male of M. spermotrophus as the male of pinus when he states 

 (Chalcis-flies, p. 244) that the two species are identical. 



2 9, 2 c^ C. O. Waterhouse (Col. British Museum); 16 9, 

 10 cf reared from cones of Abies nobilis, Astoria, Oregon. No. 

 5818, Nat. Mus. The following specimens were reared by 



