HYMENOPTERA 179 



Type. Cat. No. 5580, U. S. Nat. Museum. From Sitka, June 

 15. One specimen. 



STIBOSCOPUS FERRUGINEUS sp. nov. 



Female. Length 7 mm. Ferruginous, the antennae and legs paler, 

 more of a brownish-yellow ; head subquadrate, coriaceous, the eyes 

 black. Antennae 25-jointed, slightly thickened toward apex, the first 

 and second joint of flagellum elongate, subequal. Wings hyaline or 

 at most only faintly tinged, the stigma and veins brown, the areolet 

 large, pentagonal, the sides nearly parallel. Metathorax incompletely 

 areolated, the areola hexagonal, the lateral longitudinal carinae and the 

 basal and lateral median areas obliterated. Abdomen with the first 

 three segments finely, uniformly coriaceous. 



Type. Cat. No. 5581, U. S. Nat. Museum. From Popof Island, 

 July 9. One specimen. 



Genus Bathymetis Forster. 



This genus is well represented in North America. The following 

 table will enable the student to separate the species found in Alaska : 



TABLE OF SPECIES. 



Species rufous or ferruginous 26. 



Species black or the head and thorax black 2. 



2. Abdomen entirely black or at most with a piceous or testaceous 



tinge in one or more of the sutures 3. 



Abdomen not entirely black, either red or with one or more of 

 the segments red or marked with red 13. 



3. All coxae black or black basally. 



Antennae 2O-jointed or less. (Male 24-jointed) 8. 



Antennae 21 -jointed or more 4. 



4. Antennae less than 24-jointed. (Female 2O-jointed.) 

 Antenna? 24-jointed. Male. (Female 2O-jointed.) 



Legs black, with the sutures or more of trochanters, apices of front 

 and middle femora, the front tibiae and tarsi and the middle and 

 hind tibiae, except at apex, testaceous ; first and second joints of the 

 flagellum about equal, fully thrice as long as thick; abdomen one- 

 third longer than the head and thorax united, the petiole stout, finely 

 rugulose, not distinctly aciculate except along the sides. 



B. nigricornis. 



