HYMENOPTERA 



Genus Theroscopus Forster. 



Three of the Alaskan pezomachines fall in this genus and may be 

 tabulated as follows : 



TABLE OF SPECIES. 



I. Winged .......................................................................... 3. 



Wingless ....................................................................... 2. 



2. Black; legs, including coxae, red. Female .................... T. rufipes. 



Ferruginous, the head alone black. Female ............. T. kukakensis. 



3. Body, except a reddish tinge at apex of second abdominal segment, 



black; legs honey-yellow, with all coxze, first joint of trochanters 

 and hind femora black, the front and middle femora basally and 

 the apices of hind tibis and joints of .their tarsi, fuscous. Male. 



T. popofensis. 



THEROSCOPUS RUFIPES sp. nov. 



Female. Length 3.5 mm. Black, subopaque, coriaceous ; pedicel 

 and annulus at base of first joint of flagellum flavo-testaceous ; man- 

 dibles rufo-piceous ; legs, including coxae, rufo-testaceous. 



Head large, subquadrate, much wider than the thorax, the temples 

 full, as wide as the eyes. Thorax constricted at the middle, the scu- 

 tellum small but distinct. Wings wanting or at most represented by a 

 white scale. Metathorax obliquely truncate posteriorly, without a dis- 

 tinct transverse carina, the latter being represented by a trace only at 

 the upper hind angles of the truncature. The abdomen and antennae 

 are broken in the single specimen and cannot be described in detail. 



Male. Length 2.2 mm. Apterous and agrees well with the female, 

 except in its much smaller size and in having the legs paler, more de- 

 cidedly yellowish than rufous. The antennae are ig-jointed, with the 

 flagellum brown. The abdomen is about one third longer than the 

 head and thorax united, black and shining, except the claspers which 

 are large and broad, and dark rufous. 



Type. Cat. No. 5606, U. S. Nat. Museum. From St. Paul Island, 

 August 13 (Fur Seal Commission). Two specimens. 



THEROSCOPUS KUKAKENSIS sp. nov. 

 Female. Length 3 mm. ; ovipositor about the length of the petiole. 

 Pale ferruginous, with the head and the sheaths of the ovipositor black ; 

 antennas and legs brownish-yellow; head and thorax coriaceous, 

 opaque, the abdomen smoother and more shining although feebly 

 coriaceous. 



