% 



REVISION OF THE GENUS EXETASTES — CUSHMAN 253 



28. With distinct metallic reflections 26. caeruleus Cresson 



Without metallic reflections 29 



29. Malar space in female fully, in male nearly, as long as basal 



width of mandible; hind tarsus entirely red 27. alticola, new species 



Malar space in female distinctly, in male much, shorter than 

 basal width of mandible; hind tarsus with basal two joints 

 fuscous 28. dilutipes, new species 



30. Front and middle legs, especially the latter, largely or entirely 



black or fuscous 29. purpureus, new species 



Front and middle legs beyond trochanters, except middle tar- 

 sus, entirely red 30. rufipes Cresson 



31. Clypeus small, weakly convex in profile and almost without 



trace of transverse division; mandible short, nearly or quite 

 two-thirds as broad at base as long; malar space much shorter 

 than basal width of mandible; eyes convergent below, rarely 

 parallel; antenna nearly as long as body, very slender, atten- 

 uate at apex; abdomen slender, first tergite nearly or quite 

 three times as long as broad at apex; ovipositor sheath not 



or barely half as long as first tergite 32 



Clypeus with at least a distinct trace of transverse division; man- 

 dible usually distinctly longer; first tergite relatively broader; 

 disagreeing also with some of or all the other characters above 37 



32. Head and thorax conspicuously ornamented with yellow; pro- 



podeum in female partly ferruginous, in male broadly yellow 



at apex; antenna with white annulus 31. ornatus, new species 



Head and thorax immaculate black, in male face and sometimes 

 small markings on thorax yellow, but propodeum immaculate; 

 antenna without annulus 33 



33. NotauK weakly indicated by very broad shallow impressions 34 



Notauli not at all indicated 35 



34. AbdoiBen black 32. subimpressus, new species 



Abdomen largely ferruginous 33. nigribasis, new species 



35. Abdomen ferruginous in middle 34. rufobalteatus, new species 



Abdomen entirety black 36 



36. Legs largely black 35. angustus, new species 



Legs largely ferruginous 36. convergens, new species 



37. IMouth very narrow; malar space long, cheeks in front view 



slightly but distinctly concave; clypeus long, strongly convex 

 basally, especially in middle; propodeum with apical carina 

 more or less distinct; ovipositor recurved; ferruginous, male 

 with head and sometimes the thorax largely black with yel- 

 low markings (female with fasciate wings) 38 



Not entirely as above structurally; head and thorax not at all 



ferruginous 39 



38. Malar space fully as long as basal width of mandible. 



37. angustoralis, new species 

 Malar space shorter than basal width of mandible. -38. fascipennis Cresson 



39. Ocellocular line not or barely longer than diameter of an ocellus 



and little more than half as long as postocellar line; first ter- 

 gite distinctly constricted before spiracles; nervulus ante- 

 f ureal or interstitial (head and thorax black; abdomen and legs, 

 including coxae, ferruginous) 39. ruficoxalis, new species 



