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KEVISION OF THE GENUS EXETASTES — CUSHMAX 251 



Clypeus with apical portion not so abruptly impressed (in doubt- 

 ful eases the wings are hyaline and the ovipositor much longer 

 and curved) ; malar space in both sexes usually more than half 

 as long as basal width of mandible (in the lone exception the 

 clypeus is notably flat and the thorax is black and yellow) ; 

 ovipositor curved, sheath nearly or quite as long as first two 

 tergites 1'* 



13. Hind tibia and basitarsus not at all darkened; wings deeply in- 



fumate with stigma dark ferruginous; sheath much shorter 



than first tergite 11- propinquus, new species 



Hind tibia at apex and basitarsus blackish; wings yellowish in- 

 fumate with stigma pale yellowish ferruginous; ovipositor 

 sheath subequal to first tergite 12. scutellaris Cresson 



14. Head and thorax black and yellow, not at all ferruginous; wings 



deep flavous with apices infumate 13. igneipennis, new species 



Thorax and usually head largely or conspicuously ferruginous, 

 this color sometimes largely replaced by black in male; wings 

 uniformly infumate or subhyaline 15 



15. Temple reaching outside tangent of eye; eyes hardly as long as 



width of face, faintly divergent below; head of male black and 



yellow, not at all red 14. buccatus, new species 



Temple not reaching outside tangent of eye; eyes fully as long as 

 width of face, parallel or faintly convergent; head of male more 

 or less reddish 16 



16. Flagellum entirely black; hind femur and tibia not at all black 



apically 15. pectinatus, new species 



Flagellum largely ferruginous; hind femur and tibia blackish 



apically 16. brevicomis, new species 



17. Head and thorax finely and very densely punctate, dull; clypeal 



suture deep and straight between the foveae; clypeus rather 

 broad, strongly divided into apical and basal portions, the 

 basal portion very short; face fully as broad as length of eye, 

 nearly flat with a median rounded elevation; eyes parallel; 

 antenna in female very short, subapical joints transverse; legs 

 slender, inner hind calcarium hardly half as long as basitarsus; 

 ovipositor recurved, sheath about as long as first tergite; 

 largely ferruginous, the male with head and thorax con- 

 spicuously black marked, sometimes almost entirely black 18 



Differing in all or most of the above characters 19 



18. Wings in female distinctly fasciate; stigma pale, at base, dark at 



apex; malar space in female distinctly shorter than basal 

 width of mandible, in male barely half as long; antenna with 



about 45 joints 17. bifenestratus, new name 



Wings at most with faint traces of fasciae; stigma uniformly 

 ferruginous; malar space in female subequal to basal width of 

 mandible, in male distinctly more than half as long; antenna 

 with about 50 joints 18. obscurus Cresson 



19. Mandible long with lower tooth larger and longer than upper 



tooth; clypeus large, two-thirds as long as broad, weakly 

 convex and separated into nearly equal basal and apical 

 portions only by difference in sculpture; antenna with less 

 than 45 joints, hardly two-thirds as long as body, stout, 

 with middle joints fully as thick as long, first joint of flagellum 



