284 WILIJAM J. FOX. 



testaceous; anteniipe darker; head scarcely narrowed or produced hehind eyes, 

 subrounded behind ; space between hind ocelli much greater than that between 

 tlieni and eyes; dorsulum and scutellum with distinct, sparse punctures; middle 

 segment with large, shallow i)unctures posteriorly: first abdominal segment con- 

 vex, broadened from base to apex, finely punctured medially, more strongly 

 toward sides, in length somewhat longer than second, subpyriforni ; wings sub- 

 hyaline, nervures and stigma testaceous; marginal cell nearly two-thirds as long 

 as stigma ; third submargiual subquadrate, longer than high ; second submarginal 

 small, subpetiolate, much shorter than third on cubital nervure. Lengtli 10 mm. 



Nevada. One specimen. The first segment is rather similar to 

 that of glabrella, etc., but the basal neck is quite stout, not slender. 



16. Brachycistis intliscretus n. sp. 



•J,. — Head black; thorax and first segment pale castaueous; segments 2 and 

 following dark brown or blackish ; apical margins of segments, legs and antennae 

 testaceous; pubescence sparse and pale; head somewhat produced behind, very 

 little narrowed; space between hind ocelli about twice as great as that between 

 them and eyes; thorax indistinctly punctured ; middle segment not ridged or 

 roughened; first abdominal segment rather short and broad, distinctly, but not 

 strongly punctured, other segments indistinctly punctured ; wings subhyaline; 

 nervures testaceous; stigma brown; marginal cell a little longer than half of 

 stigma; third submarginal cell nearly quadrate, if anything, higher than long; 

 second submarginal petiolate, much shorter than the third on the cubital 

 nervure. Length 6 mm. 



Arizona: Willcox, July 24th (Hubbard j. One .s})ecimen in col- 

 lection of U. S. National Museum. 



\ 17. Brachycistis seqiialis n. sp. 



W .^ ' -^ . — Pale castaneous, clothed with sparse, whitish pubescence; anteniife paler; 



»^legs palest, tending to testaceous; head somewhat produced behind eyes, but 

 scarcely narrowed ; space between hind ocelli greater than that between them 

 and eyes; thorax strongly punctured, the dorsulum and scutellum sparsely; 

 niesosternum presenting two rather prominent convexities, which are more or 

 less transversely striated as well as punctate, the striae hardly evident in one 

 example ; middle segment roughened posteriorly, the upper and posterior sur- 

 faces separated by a sharp ridge, sulcus of upper surface broad ; first abdominal 

 segment short and broad, strongly punctured, barely as long as second segment ; 

 wings subhyaline ; nervures and stigma brownish; marginal cell equalling the 

 stigma in length ; third submarginal much longer than high ; second subtrian- 

 gular about as long as third on cubital nervure; the first and second transverso- 

 cubital veins widely separated above. Length 12-13 mm. 



Colorado ; Nevada ; Arizona. Four specimens. 



18. Brachycisti!^ triangularis n. sp. 



"J, . — Pale castaneous, clothed with a tolerably dense, whitish pubescence; legs 

 tending to testaceous; head a little produced behind, but not narrowed ; s|)ace 

 between hind ocelli greater than t^liat between them and eyes; niesosternum 

 with large, sparse punctures, the mesqpleurse with closer punctures; middle seg- 

 ment rougheued behind, especially above, not ridged, the sulcus of upper surfaces 



i 



