[171] HYMENOPTERA 1 77 



5. Hind coxae black ; anterior and middle legs ferruginous or reddish, 

 the hind legs black or fuscous, their tibiae more or less ferru- 

 ginous basally. 



Antennae 23-jointed ; abdomen with the petiole shagreened, the second 



and following segments smooth. Male 5. mandibularis. 



Antennae 2i-jointed, very long; abdomen with the petiole and the sec- 

 ond segment finely shagreened, those beyond smooth. Male. 



6". sitkensis. 



6. Antennae 25-jointed; sheaths of ovipositor black; wings hyaline, the 

 costal vein and the stigma light brown or brownish-yellow, the sub- 

 costal vein and the internal veins dark brown. Male. ..5. ferrugineus. 



STIBOSCOPUS SANCTIPAULI sp. nov. 



Female. Length 2.5 mm. Polished black, the ovipositor about 

 one-third the length of the abdomen, the sutures of the trochanters, 

 tibiae and the extreme apices of the tarsal joints dark rufous. Antennae 

 2O-jointed, thickened toward apex, the first joint of the flagellum only 

 about two-thirds the length of the second. Wings subhyaline, the 

 stigma and veins brown. The head is large, quadrate ; the mesonotum 

 on the disk is flat, the scutellum with a crenate furrow across the base ; 

 the metathorax is completely areolated, the areola nearly horse-hoof 

 shaped. Abdomen polished, shining; the first segment is feebly 

 coriaceous at sides and towards base, polished at apex, the second and 

 third segments large, subequal, broader than long, the second a little 

 longer than the first. 



Type. Cat. No. 5576, U. S. Nat. Museum. From St. Paul Island, 

 August 15 (Fur Seal Commission). One specimen. 



STIBOSCOPUS ALASKENSIS sp. nov. 



Female. Length 3.4 mm. Polished black; legs, except the 

 middle coxae, basally and the hind coxae ferruginous; antennae 21- 

 jointed, the first joint of the flagellum a little longer than the second, 

 with a pale annulus at base. Wings hyaline, the stigma and veins 

 yellowish. The head is transverse quadrate, the mesonotum feebly de- 

 pressed posteriorly, the scutellum with a non-crenate furrow across the 

 base, the metathorax areolated, the areola hexagonal, wider than long. 

 Abdomen oblong-oval, similar to S. sanctipauli, except that the petiole 

 or first segment is longitudinally striate. 



Type. Cat. No. 5577, U. S. Nat. Museum. From St. Paul 

 Island, August 15 (Fur Seal Commission). One specimen. 



