ICHNEUMON-FLIES, PART 2 1 XORIDINAE 493 



10. First tergite rather broad, its sternite surpassing spiracle by about 0.5 the 



average width of the sternite in male, ending at the spiracle in female; 

 punctures on mesopleurum rather dense, their interspaces about 0.8 their 



diameter 19. californicus (Cresson) 



First tergite narrow, its sternite surpassing spiracle by about 1.5 the average 

 width of the sternite in male, by about 1.0 the average width of the sternite 

 in female; punctures on mesopleurum rather sparse, their interspaces about 

 1.5 their diameter 21. cincticornis (Cresson) 



11. Lower half of temple with fine vertical striae and inconspicuous small punc- 



tures (figs. 316,d,e); female fiagellum without a white band. Insularis 



group (p. 509) 12 



Lower half of temple with punctures and sometimes (in X. boharti) also 

 obliquely rugulose 16 



12. Front orbit and upper margin of pronotum with a broad whitish stripe (the 



pronotal stripe rarely absent in males) ; second tergite mostly transversely 



aciculate 12. insularis (Cresson) 



Front orbit and upper margin of pronotum entirely black; second tergite 

 evenly mat or longitudinally rugulose 13 



13. Second tergite longitudinally rugulose; median longitudinal carinae of first 



tergite strong, extending beyond the spiracle; punctures on top of head 

 rather dense, separated by about 0.7 their diameter . 8. rudis, new species 

 Second tergite evenly mat; median longitudinal carinae of first tergite absent 

 or weak, not reaching the spiracle; punctures on top of head rather sparse 

 to very sparse, separated by at least 1.5 their diameter 14 



14. Mesopleurum and mesosternum strongly mat; mesoscutum completely flat 



except at sides and front 9. planus, new species 



Mesopleurum polished and punctate, sometimes weakly mat in part; mesoscu- 

 tum more or less convex, at least the median lobe a little convex ... 15 



15. Punctures on top of head separated by about twice their diameter; first 



tergite of female about 1.75 as long as wide . . 10. medius, new species 



Punctures on top of head separated by three or more times their diameter; 



first tergite of female about 2.5 as long as wide . . 11. eastoni (Rohwer) 



16. First tergite with a deep oblique lateral groove just beyond the spiracle; 



female fiagellum without a white band; head and body entirely blackish. 



Frigidus group (p. 503) 2. frigidus (Cresson) 



First tergite without a deep oblique groove just beyond the spiracle; female 

 fiagellum with a white band. Rileyi group (p. 504) 17 



17. Lower half of temple strongly obliquely rugulose (fig. 316, b); legs entirely 



black 6. boharti, new species 



Lower half of temple punctate, without strong rugulae; legs partly pale, at 

 least the base of tibiae whitish 18 



18. Median longitudinal carinae of propodeum approximate but not fused basad 



of areola; median longitudinal carinae of first tergite distinct to its apex; 



side of thorax with whitish markings 3. pictus, new species 



Median longitudinal carinae of propodeum fused basad of areola; median 

 longitudinal carinae of first tergite absent beyond middle in female, com- 

 plete to apex in male; side of thorax without whitish markings .... 19 



19. First tergite slender basallj, the part in front of spiracle about 2.0 as long as 



wide across spiracles in male, about 1.7 as long as wide across spiracles in 



female; apical tergites entirely black 7. rileyi (Ashmead) 



First tergite thick basally, the part in front of spiracle about 1.5 as long as 

 wide across spiracles in male, about 0.85 as long as wide across spiracles in 

 female; apical tergites of female bordered with white 20 



