﻿NE ARCTIC SPECIES OF GASTERUPTIIDAE — TOWNES 131 



14. Third tergite of both sexes with only apical 0.4 or less ferruginous; second 

 segment of hind tarsus of female more or less white; top of head with 

 weak, fine, transverse wrinkles; Atlantic to Rocky Mountain region, also 



British Columbia 10a. bamstoni bamstoni Westwood 



Third tergite of female (and often also of male) more than half ferruginous; 

 second segment of hind tarsus blackish; top of head with strong, fine, 

 transverse wrinkles; Pacific to Rocky Mountain region. 



10b. bamstoni perplexus Cresson 



1. RHYDINOFOENUS SEPTENTRIONALIS (Schletterer), new combination 



Gasteruption septenirionale Schletterer, Ann. Naturh. Hofnius. Wicn, vol. 4, 

 p. 480, 1890. Type: ?, British Columbia (Vienna). 



Ovipositor sheath about 0.9 as long asforewing. 



Female: Forewing about 5.5 mm. long; top of head with fine 

 punctures and rather strong transverse fine wrinlding; temple weakly 

 convex; head about 0.43 as wide at the occipital carina as at the 

 eyes; occipital carina separated from the head by a rounded groove, 

 about 0.3 as wide as the flagellum, transversely striate basally and 

 somewhat reflexed: propleurum (measured from the coxal articulation 

 to the apical flange) about 1,05 as long as the width of the mesoscutum, 

 with small close punctures and some irregular wrinkling; lateral lobe 

 of mesoscutum polished, with fine close punctures that are somewhat 

 confluent with fine transverse wrinkles, and also with some sparser 

 larger punctures; ovipositor sheath about 0.9 as long as forewing. 



Blackish. Mandible ferruginous to brown; tegula ferruginous to 

 dark brown ; legs beyond coxae brown to blackish, the fore and middle 

 tibiae with or without paler apical and subbasal or basal external 

 paler marks, and the hind tibia with a small indistinct internal sub- 

 basal whitish mark; abdomen ferruginous at the apex of the first 

 tergite, on the apical 0.35 ± of second tergite, apical 0.3 ± of third 

 tergite, and apical 0.2 ± of fourth tergite; apical 0.1 ± of ovipositor 

 sheath whitish. 



Male: Unl^nown. 



Specimens: 9, Waterton, Alberta, July 14, 1922, H. L. Seamans 

 (Ottawa). 9, Williams, Ariz., June 15, Barber and Schwarz (Wash- 

 ington). 9, Kaslo, British Columbia, July 11, 1912, R. C. Osburn 

 (Washington). 9, Cimarron, Colo., September 14, 1917, R. C. 

 Shannon (Ithaca). 9, Antelope Mountain, Harney County, 6,500 

 feet, July 6, 1931, D. K. Frewing (Corvallis). 



This species is widespread west of the Continental Divide but scarce 

 in collections. 



2. RHYDINOFOENUS PATTERSONAE (Melander and Brues), new combination 



Gasteruption pattersonae Melander and Brues, Biol. Bull., vol. 3, p. 35, 1902. 



Type: 9, San Jose, Calif. (Cambridge). 

 Gasteruption pyrrhosternum Kieffer, Invertebrata Pacifica, vol. 1, p. 41, 1904. 



Types: 2 9, Stanford University, Calif. (Ithaca). 



