18 PROCEEDINGS OF THE NATIONAL MUSEVM vai.. 6& 



KBY TO SPECIES 



1. Black species; clypeus with a raised marginal point; carina extending from 



inner tooth to base of mandible strongly, but not angularly, elevated near 



base. micrommata Bradley. 



Brownish-orange species 2. 



2. Head concolorous with thorax, brownish-orange; mandible with a carina from 



inner tooth to base which is not appreciably elevated near base 3. 



Head black, contrasting with the brownish-orange thorax; mandible with a 

 carina from inner tooth to base which is prominently elevated near base. .4. 



3. Clypeus with a short thin transverse elevation or lip in center of apical margin, 



the edge very narrowly and steeply beveled beyond it; anterior elevation 



of gular carina in line with mandibular condyle, close to it and deflexed 



intermedia, new species. 



Clypeus with a vertical rounded elevation in middle, the apical edge narrowly 

 beveled; anterior elevation of gular carina behind mandibular condyle, 

 remote from it, and deflexed verticalis, new species. 



4. Propodeum smooth above; extreme height of first abdominal segment as seen 



from the side less than half as great as length of segment along lateral 



suture melanocephala, new species. 



Propodeum finely striate on each side on dorsum; extreme height of first 

 abdominal segment over half as great as length of segment along lateral 

 suture dakotensis, new species 



BRACHYCISTIS (BRACHYCISTIS) MICROMMATA Bradley 



Bradley's synoptic description of the color, etc., of this species is as 

 follows: Black, the tarsi and antennae brown, the latter dark except 

 at base; sparsely clothed with somewhat yellowish pile; wings 

 hyaline, slightly infuscated beyond stigma, which is piceous; veins 

 brownish-yellow to piceous. 



Length, 8 mm., slender. 



The head of this species must differ in many details from that of 

 melanocephala, as indicated by the characters here taken from the 

 original description. Measurements of ocelli, etc. : Posterior ocellus, 

 diameter, 0.17 mm.; distance of posterior ocellus from eye, 0.3; 

 distance between posterior ocelli, 0.38 mm.; inferior margin of 

 antennal socket thickened, with a downward projecting triangular 

 tubercle. The clypeus and mandibles are apparently similar to 

 those of melanocephala but no mention is made of the structure of 

 the gular carina. The venation of the fore wing as figured by Bradley 

 is the same as that of melanocephala. 



Originally described from Berkeley, Calif. Type in Cornell 

 University. 



BRACHYCISTIS (BRACHYCISTIS) INTERMEDIA, new species 



Male. — Brownish-orange. Tips of mandibles castaneous. Stigma 

 fuscous. 



Head above similar to that of texana; space between post.erior 

 ocelli and eye about twice as wide as transverse diameter of either 

 ocellus; space between eye and antennal socket equal to socket; 



