NO. 2202. GIFFARD COLLECTION OF ETMENOPTERA—ROnWER. 235 



ANCISTROCERUS SEXCINGULATUS Ashmcad. 



Three males from Tahoe, Eldorado County, collected June, 1909, 

 at an altitude of G,200 feet; one male from Summit, Placer County, 

 July, 1907. 



In one specimen from Tahoe there are two small spots on the 

 scutellum, and in the specimen from Summit these spots are present 

 and larger. 



ANCISTROCERUS SUTTERIANUS Saussure. 



One male from Alameda County, collected July, 1907. 



ANCISTROCERUS TAHOENSIS, new species. 



This species belongs to Saussure's Group II B, p. ISO, " Synopsis 

 of American Wasps," and judging from the description must re- 

 semble paridesi Saussure in structure, but the abdomen is not conical 

 and the color is quite different. 



Female. — Length to apex of second tergite 8 mm. Clypeus with 

 its length and width subequal, surface punctured to irregularly 

 striate, the apical margin truncate ; front with close almost confluent 

 punctures; vertex more sparsely punctured, not tuberculate; angles 

 of the pronotum prominent but not tuberculate; propodeum reticu- 

 late dorsally, finely striate posteriorly; thorax punctured like the 

 front; first tergite transverse, almost as wide as second; second 

 tergite twice as long as the first and not at all reflexed; first two 

 tergites with a few small scattered punctures; somewhat obscured 

 by the appressed pubescence. Black; clypeus except margin and a 

 rather large median basal spot, a spot between the antennae, scape 

 beneath, dot behind the summit of eyes, anterior margin of the pro- 

 notum, tegulae, spot beneath, two spots on the scutellum, two spots 

 on the metanotum, apical margin of the abdominal segments 

 (slightly broader laterally), an elongate free spot on second tergite, 

 and legs below the knee, j'cllow; head and thorax with long gray 

 hair; wings subhyaline, the apical margin dusk}', basal anterior 

 margin 3'ellowish; costa and stigma yellow, the rest of the venation 

 brown. 



Type-locality. — Tahoe, Eldorado County, California. Described 

 from a single female collected at an altitude of G,200 feet, in June, 

 1909, by W. I\r. Giffard. 



Type.— Cut No. 20330, U.S.N.M. 



ANCISTROCERUS LUCIDUS. new species. 



This small slender species is allied to sevcingulatus Ashmead, but 

 may be readily separated from Ashmcad's species by the sparse 

 punctures on the front (in sexcingulatus the front is closely, almost 

 confluently punctured ) . 



