﻿NEARCTIC SPECIES OF GASTERUPTIIDAE — TOWNES 91 



15. Thorax of female less than a third blackish; habitat British Columbia, Wash- 



ington, Oregon, California, and Idaho. 



16a. occidentalis lavatus, new subspecies 



Thorax of female usually more than a third blackish; habitat Idaho, Wyoming, 



Utah, Colorado, and New Mexico. 15b. occidentalis occidentalis Cresson 



16. Tarsal claws each with four teeth; occipital carina a prominent rcflexcd flange 



(figs. 16, a, h). .._ - 17 



Tarsal claws each with three teeth 18 



17. Hind coxa entirely ferruginous; thorax more or less ferruginous. 



6. oregonus, new species 

 Hind coxa largely or entirely black; thorax entirely black. 



7. pacificus Cresson 



18. Occipital carina a reflexed flange that is about 0.4 as wide as the basal flagellar 



segment (figs. 16, c, d); temple strongly convex 19 



Occipital carina a narrow rim, not more than 0.2 as wide as the basal flagellar 

 segment (figs. 16, e-g); temple less strongly convex 20 



19. First tergite about 2.8 as long as wide in female (male unknown) ; third tergite 



entirely ferruginous; fifth and following segments entirely black; head, as 

 seen from above, about 0.78 as long as wide (fig. 16, c) ; ovipositor sheath 



about 1.5 as long as the forewing 8. arizonicus, new species 



First tergite about 1.6 as long as wide in female, about 1.9 as long as wide in 

 male; third tergite usually largely black, when entirely ferruginous the fifth 

 and following segments partly ferruginous below; head, as seen from ebove, 

 about 0.70 as long as wide (fig. 16, d) ; ovipositor sheath about 1.2 as long 

 as forewing 9. resutorivorus Westwood 



20. Frons with close fine transverse wrinkles; California. 



11. califomicus, new species 

 Frons without transverse wrinkles or with only faint ones 21 



21. Temple, as seen from above, longer than eye (fig. 16,/) ; frons distinctly punc- 



tate; median lobe of mesoscutum without or with weak transverse ridges; 



hind tibia fuscous, paler at ends 12. canadensis, new species 



Temple, as seen from above, shorter than eye (fig. 16, g) ; frons sparsely and 

 very weakly punctate; median lobe of mesoscutum with transverse ridges; 

 hind tibia yellowish, not or weakly infuscate 13. stigmaterus Cresson 



1. AULACOSTETHUS FASCIATUS (Say), new combination 



Figure 15, a 



Aulacus fasciaius Say, Contrib. Maclurian Lye. Arts Sci., vol. 1, p. 67, 1829; 

 LeConte ed., vol. 1, p. 373. Type: 9 , Ohio (destroyed). 



Forewing black, with a transverse oval yellowish spot. 



Female: Forewing about 12.5 mm. long; as seen from above, head 

 about 0.74 as long as wide; frons with rather sparse, moderately small 

 punctures; top of head with small moderately distant punctures; as 

 seen from above, the temple about 0.7 as long as the eye, full, strongly 

 and evenly convex; occipital carina weak and very blunt; propleurum 

 with rather coarse, moderately close punctures; pronotum with close, 

 deep, often confluent punctures and some short sharp wrinldes, with- 

 out a tooth on its anterior edge; hind coxa above with coarse deep 

 punctures that are somewhat confluent with transverse wrinkles; 

 tarsal claws with four teeth; ovipositor sheath about 0.9 as long as the 

 forewing. 



