HYMENOPTERA FROM LOWER CALIFORNIA. I I 



curved line, extending from side to side at apex of upper 

 face of metathorax, large spot on metapleura which is 

 emarginate above, legs entirely, including the coxae, a 

 broad fascia on abdominal segments 1-5, that on the first 

 greatly narrowed medially, that on the second scarcely 

 narrowed, but enclosing two transversely-ovate black 

 spots, on third, fourth and fifth segments the fasciae have 

 two strong emarginations on anterior margin and a weaker 

 one on posterior margin in the middle, sixth dorsal seg- 

 ment entirely and fasciae on ventral segments which (the 

 fasciae) are more or less variable, all sulphur-yellow; 

 wings clear hyaline, nervures brownish; antenna? rather 

 long, reaching beyond the tegulcC, the first joint of flagel- 

 lum fully as long as the second, third and half of the 

 fourth united; clypeus and labrum indistinctly punc- 

 tured; thorax microscopically punctured; posterior face 

 of metathorax with a large triangular depression at top ; 

 tibicC and tarsi strongly spinose; anterior tarsi with a 

 well developed comb, the spines of which are shortest 

 basally, the longest spines equal fully the length of the 

 first joint; abdomen very finely shagreened. Length 

 21—23 I'liii'i- 



3 . — Markings and coloration similar to the female, al- 

 though the coxjE and trochanters are more or less black ; 

 antennae scarcely reaching beyond tegul^e, joints 7-9 

 dentate beneath ; legs armed as in the female; second 

 ventral segment with a strong, longitudinal central keel, 

 which is more prominent apically; sixth ventral with two 

 approximate teeth, which, when viewed from the side, 

 appear as one. Length, 20-21 mm. 



Reno, Nevada {HiUman); California (coll. Am. Ent. 

 Soc), and San Jose del Cabo, L. Cal. {Eisen). Related 

 to and closely resembles B. nuhilipcnnis Cress., from 

 which it usuallvcan be distino-uished bv the hyaline wings ; 



