Sept., iqo4.] ASHMEAD : HyMENOPTERA FROM JaPAN. 161 



thorax, the first body segment occupying half the whole surface, in male, short-oval, 

 not more than half the length of the thorax, the first body segment occupying two 

 thirds the whole surface. 



Type. — No. 7200, U. S. National Museum. 

 Gifu (Mr. Y. Nawa). 



Derostenus mitsukurii, new species. 



9 . Length, I-I.2 mm. Dark blue, the head above and the disk of the thorax 

 aeneous, the abdomen dark blue, the thorax above and the scutellum delicately retic- 

 ulated ; flagellum brown ; legs, except the coxae, pale or yellowish-white ; wings 

 hyaline, the veins light brown ; abdomen oval, only about two thirds the length of 

 the thorax, the first body segment occupying most of the surface, the following very 

 short, retracted. 



Type. — No. 7201, U. S. National Museum. 

 Japan (Dr. Mitsukuri). Many specimens. 



Tribe IV, Pediobiim. 



Genus NESOMYIA Ashmead. 



Nesomyia albipes, new species. 



9 . Length, 2 mm. Metallic blue-green, the cheeks and the clypeus brassy, 

 the abdomen conic-ovate, aeneous black, the middle lobe of the mesonotum and the 

 scutellum scaly punctate, the parapsidal furrows indicated by depressions only ; fla- 

 gellum black, finely pubescent ; legs, except coxse and the last joint of the tarsi, 

 waxy-white ; wings hyaline, the disk of the front wings with a subfuscous cloud, the 

 veins light brown, the marginal vein very long, the stigmal vein very short, ending in 

 a little knob, the postmarginal vein long. 



Type. — No. 7202, U. S. National Museum. 

 Atami (Mr. A. Koebele). One specimen. 



Nesomyia cinctiventris, new species. 



9. Length, 1. 1 mm. Blue, the head behind and on the clypeus, and the tip 

 of the abdomen aeneous, the abdomen conically pointed, as long or a little longer 

 than the head and thorax united with a transverse yellowish or whitish band just be- 

 yond the base ; scape and legs waxy- white, the flagellum light brownish ; wings hya- 

 line, the veins pale. 



Type. — No. 7739, U. S. National Museum. 

 Gifu (Mr. Y. Nawa). Two specimens. 



Subfamily II, Aphelinin.e. 

 Genus APHELINUS Dalman. 

 Aphelinus japonicus, new species. 



9. Length, 0.6 mm. Honey-yellow, the eyes light brown, the occiput above 

 dusky, the scutellum, post-scutellum and a spot on each side of the middle bluish- 



