﻿NEARCTIC SPECIES OF GASTERUPTIIDAE — TOWNES 129 



an external basal pale area; hind tibia usually with a subbasal pale 

 area; hind basitarsus of female usually with a subapical pale band; 

 abdomen ferruginous from about the apical 0.4 of second tergite 

 to the basal part of the sLxth tergite, the third and fourth tergites 

 with a narrow to broad fuscous saddle and the fifth tergite with a 

 broad fuscous saddle; apical 0.12 of ovipositor sheath whitish. 



Type: 9, Banjo Bill Camp Ground, Oak Creek Canyon, Ariz., 

 May 20, 1947, H. and M. Townes (Townes). Collected with the 

 aid of a grant from the American Philosophical Society. 



Paratypes: cf, same data as the type (Townes). 9, Flagstaff, 

 Ariz., 7,000 feet, July 20, 1934, R. G. Schmieder (Townes). 9, 

 Creede, Colo., 8,844 feet, August 1914, S. J. Hunter (Lawrence). 



Genus RHYDINOFOENUS Bradley 



Rhydinojoenus Bradley, Deutsche Ent. Zeitschr., 1909, p. 39. Type: Rhydino- 

 foenus kaweahensis Bradley; original designation. 



In addition to the differences pointed out in the key, this genus 

 differs from Gasterwption in having the antenna, thorax, abdomen, 

 and legs somewhat longer and the hind tarsus often marked with white. 

 The long ovipositor, deep apical split in the female subgenital plate, 

 and acute pronotal tooth are the recognition characters. 



KEY TO THE NEARCTIC SPECIES OF RHYDINOFOENUS 



1. First abscissa of subdiscoidal vein absent (fig. 15, A;); mandible without 



a small dorsal preapical tooth 12. kaweahensis Bradley 



First abscissa of subdiscoidal vein present (fig. 15, I) ; mandible with a smaU 

 dorsal preapical tooth 2 



2. Occipital carina or flange weakly reflexed and divided from head by a broad 



groove so that division between head and occipital carina is not sharp 

 and sculpture of head appears to invade basal part of carina; ovipositor 

 sheath 0.8 to 2.5 as long as forewing, broadly or narrowly white at apex. 

 [R. septentrionab's and R. pattersonae belong here, though they are somewhat 

 intermediate in the character of the occipital carina ; in them the ovipositor 

 sheath is narrowly tipped with white and less than 1 .7 as long as fore wing.) ..3 

 Occipital carina or flange sharply reflexed and divided from head by a 

 sharp groove, entirely without sculpture; ovipositor sheath 1.7 to 2.3 as 

 long as forewing, broadly white at apex 7 



3. Top of head behind ocelli with some fine transverse wrinkling, which often 



invades base of occipital flange 4 



Top of head behind ocelli without distinct fine wrinkling, only with fine 

 punctures 6 



4. Head about 0.37 as wide at occipital carina as at eyes; outer side of fore and 



middle tibiae usually with an external white stripe from base to apex; ovi- 

 positor sheath about 2.3 as long as forewing, its tip broadly white. 



3. striatus, new species 



Head about 0.40 to 0.54 as wide at occipital carina as at eyes; outer side of 



fore and middle tibiae without a complete external white stripe; ovipositor 



sheath 0.8 to 1.6 as long as forewing, its tip narrowly white or whitish 5 



