1893.] NATURAL SCIENCES OF PHILADELPHIA. 547 



metathorax above finely granulated, the metapleurse rugose; trans- 

 verse mark before ocelli and tegulse, white; apical third of wings 

 dark fuscous. Length 9 mm. 



Montana. The most satisfactory way to separate the males of this 

 species from the male variety of elegans, is by the color of apical 

 third of wings and color of humeral tubercles. This species may be 

 but a variety of A. Kohli Cam. from Mexico. 



10. — Astatus elegans Cress. 

 Astata elegans Or., Proc. Ent. Sect. Acad. Nat. Sciences,Phila. 1881, p. VI, $ . 

 As/a/i/s elegans Kohl., 1. c. p. 448. 



9 . — Median lobe of clypeus tridentate; front with strong, sparse, 

 irregular punctures ; vertex with strong, sparse punctures, which are 

 deeper than those of the iront; first joint of flagellum more than one- 

 quarter longer than the second; dorsulum with large, scattered punc- 

 tures ;dorsulum with scattered punctures,distinctly impressed; metatho- 

 rax above rather strongly impressed down the middle, finely and ir- 

 regularly striated, the metapleune more strongly striated; meso- 

 pleune sparsely punctured ; tibiae and tarsi rather strongly spinose; 

 abdomen almost impunctate; pygidial area more than twice longer 

 than it is broad at base (it is broad basally, then contracting before 

 middle and continuing narrowly to the apex). Black; abdomen 

 entirely red; mandibles medially and legs testaceous; teguhe, 

 shoulder tubercles and spot at top ot mesopleime, white; head tho- 

 rax and legs very sparsely clothed with pale pubescence; wings sub- 

 hyaline, marginal cell truncate; stigma yellow. Length 8 J— 9 mm. 



$ . — Median lobe of clypeus produced into a sharp tooth or spur; 

 first joint of flagellum not one-quarter longer than the second ; dor- 

 sulum anteriorly rather finely and closely punctured, on the poster- 

 ior part sparsely so; scutellum impressed; metathorax above evi- 

 dently granulated, depressed before apex, the metapleurre rugose; in 

 addition to the white markings of the ? , there is a large transverse 

 mark before the ocelli, base of wings, a spot at base of anterior and 

 middle tibiae, and a band near the apex of the first dorsal segment, 

 which is sometimes interrupted medially, white ; wings subhya- 

 line, not darker apically. Length 7-9 mm. 



Var. $. — No white markings on first abdominal segment. 



Washington; Vancouver; Nevada; Colorado. The variety men- 

 tioned above may prove to be the male of nevadicus. 



