8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



to Salman the the parasite was very active in controlling this pest 

 of arborvitae in Maine during the season of 1927. 



Three specimens of the same species were received from C. E. 

 Crosby, reared from R. thujaella at Ithaca, N. Y., July 2, 1925. 



. Family PTEROMALIDAE 



HABROCYTUS PHYCIDIS Ashmead 



Ha'brocytus phycidis Ashmead, Proe. Ent. Soc. Wash,, vol. 4, 1898, p. 157. 

 Eabrocytus dux Gieaitlt, Can. Ent., vol. 49, 1917, pp. 181 and 1821 (new 

 synonym). 



Habrocytus phyddis Ashmead was described from one specimen 

 said to have been reared by George W. Dimmock from a larva of 

 [Phycis) Ac7'obasis rubHfasciella Packard, July 25, 1892, at Canobie 

 Lake, N. H. Habrocytus dux Girault was described from the same 

 specimen and hence is a synonym. The name phycidis should be 

 substituted for dkios in Girault's key (see above citation), and the 

 name piercei Crawford, which is a good species, should replace 

 phycidis as treated in the key, since Girault's synonymizing of piercei 

 with phycidis is based upon a misinterpretation of Ashmead's species. 



Family EULOPHIDAE 



HORISMENUS DEPRESSUS, new species 



Very closely related to H. popenoei Ashmead but differs byJiaving 

 the scutellum very nearlj^ flat, the face below antennae entirely very 

 finely wrinkled or with only a small smooth spot between bases of 

 antennae instead of being mostly smooth and polished, and the apical 

 abdominal segments more strongly retracted. 



Female. — Length, 1.85 mm. Occiput, vertex, and f rons above trans- 

 verse groove uniformly very finely reticulate-punctate; frons below 

 the transverse groove coarsely punctate; cheeks polished; antennal 

 pedicel very nearly as long as first funicle joint; funicle 3-jointed, 

 the joints hairy and distinctly separated, the first about twice as 

 long as broad, second slightly shorter than first, third a little longer 

 than broad; club ovate, about as long as first funicle joint and scarcely 

 thicker than the funicle joints; thorax broader between the wings 

 than thick dorsoventrallj'', the scutelluiii flattened and in the same 

 horizontal plane as the middle of propodeum or very nearly so, the 

 propodeum not declivous ; dorsal posterior portion of pronotum short, 

 separated from the declivous anterior portion by a sharp margin, dis- 

 tinctly sculptured along anterior margin, the posterior border smooth ; 

 declivous portion of pronotum reticulate-punctate; mesonotum with 

 fine shallow reticulation, shining ; f oveae at posterior end of parapsi- 

 dal grooves shallow and elongate; scutellum similarl^^ but not quite 



