134 [June 



Genus AULACUS. Jurine. 



1. A. rufitarsis. n. sp. 



Black ; abdomen and tarsi rufous. 



Female. — Head black; cheeks, vertex, occiput and mandibles pol- 

 ished ; face subopaque, slightly pubescent; antennae longer than the 

 head and thorax, black. Thorax black, gibbous, deeply and trans- 

 versely wrinkled above, the furrows apparently impunctured ; scutelluni 

 more finely wrinkled and having two short longitudinal impressions, 

 close together, on the disk ; metathorax rugose. Wings hyaline costa 

 fuliginous, nervures and stigma black, the second transverse nervure 

 almost entirely obliterated. Legs black ; femora polished ; coxae ru- 

 gose ; posterior tibiEe flattened and having a few large confluent punc- 

 tures exteriorly ; tarsi rufous, their claws black, sometimes the anterior 

 tarsi are blackish, and in one specimen the two anterior pairs of legs 

 are rufo-pieeous. Abdomen bright rufous, polished, impunctured. ex- 

 treme base black ; ovipositor rather longer than the body, yellmvish, 

 valves black. Jjength 5 lines ; expanse of wings 8 lines. 



Huh. — Rocky Mountains, Colorado Territory. 



2. A. stigmaterus, n. sp. 



Black ; the first and second abdominal segments rufous ; legs in most part 

 pale fulvous. 



Female. — Head black, cheeks, vertex, occiput and mandibles pol- 

 ished, the face slightly pubescent ; the anterior margin of the clypeus 

 and a large spot on the mandibles, pale testaceous ; antennae longer 

 than head and thorax, black, reddish at tip. Thorax black, gibbous, 

 rather deeply and transversely wrinkled above, the furrows apparently 

 impunctured ; pleura not so coarsely rugose ; metathorax coarsely ru- 

 gose. Wings hyaline, nervures and stigma fuscous; the extreme apex 

 and a subtriangular mark extending from the stigma to the radial ner- 

 vure at the junction between the marginal and the first submarginal 

 cells, fuscous ; posterior half of the second transverse nervure obliter- 

 ated. Legs pale fulvous, the tarsi paler, all the coxae and trochanters 

 and the posterior femora except extreme base and apex black, the pos- 

 terior tibiae slightly obfuscated. Abdomen black, polished, impunc- 

 tured; the peduncle and the third and following segments black, the 

 first and second segments being bright rufous ; ovipositor rather longer 

 than the body, fulvous, valves black. Length 5 lines ; expanse of 

 wings 8 lines. 



