ABT. 3 WASPS OF SUBFAMILY BRACHYCISTIINAE MALLOCH 15 



third submarginal cell shows width narrowing above. I assume 

 that protracta is a distinct species, but the characters quoted above 

 are not to be accepted as criteria in their entirety for their differ- 

 entiation. 



I have seen ampla from Colorado, from which State it was originally 

 described, and from Washington State. 



INAEQUALIS group 



Characters. — Distinguished from others by the narrow space be- 

 tween the eyes and the antennal sockets, which is not more than, 

 and often considerably less than, equal to half the width of the 

 socket. The face is much narrowed below, the space between the 

 eyes at narrowest point being distinctly less than the distance across 

 posterior ocelli. The space between the eyes and posterior ocelli 

 is never appreciably greater than the transverse diameter of one 

 ocellus, and is often distinctly less. 



KEY TO SPECIES 



1. Hind tibiae without pronounced dorsal bristles, sometimes with a weak one 



near middle; mandibles without a pronounced angle between inner tooth 

 and base 2. 



Hind tibiae with some pronounced bristles on dorsal surface extending from 

 before middle to apex, or if these are weak or sparse the mandibles are 

 distinctly angulate between inner tooth and base 4. 



2. Anterior extremities of gular carina not visible below condyle when head is 



seen from side; head black above; vein emanating from apical costal angle 



of stigma as in inaequalis nigrifrons, new species. 



Anterior extremities of gular carina distinctly visible when head is seen from 

 the side 3. 



3. Head dark castaneous above; vein emanting from apical costal angle of stigma 



bent down just after leaving latter (fig. 22) curvata, new species. 



Head little if any darker than thorax and abdomen; vein emanating from 

 apical costal angle of stigma running along costa for a short distance before 

 bending down (fig. 20) inaequalis Fox. 



4. Mandible without an evident angle between base and inner tooth 



(See nitida group). 

 Mandible with a pronounced angle between base and inner tooth 5. 



5. A line drawn across the highest points of deflexed anterior parts of gular 



carina would pass through the mandibular condyle; hind tibiae each with 



one or two weak bristles about middle 6. 



A line drawn across the highest points of deflexed anterior parts of gular 

 carina would pass behind the mandibular condyles, hind tiUja with quite 

 strong dorsal bristles; head brownish orange alcanor Blake. 



6. Head black above; clypeus with a small but rather prominent tubercle in 



middle of anterior margin ' dentata Bradley. 



Head pale castaneous above; clypeus vdih its apical margin produced into 

 a short transverse edge which is slightly rounded in outline, the elevated 

 portion as wide as space between antennal sockets. -utahensis, new species. 



1 The space between antennal socket and eye in this species appears to be variable in width or else there 

 are two closely allied species present in my material. In any case I have included drntata in two of my 

 Keys leaving the specific status of these forms for future investigation. 



