INSECUTOR INSCITI.^ M^NSTRUUS 107 



species in North America, resembles costalis and allies. The 

 paratype is somewhat smaller than the type. 



Stelis perpulchra, new species. 



Male. — Length about 6 mm. (but apex of abdomen strongly 

 incurved). Black with the following light yellow markings: 

 Inner orbits, broadened below, line on each side of anterior 

 margin of mesoscutum, margin of axillae and scutellum, the 

 latter broadly interrupted medially, spot on tubercles, line on 

 tegulae, spot under insertion of posterior wings, spot on under 

 side of front femora at apex, all knees, band on first abdominal 

 segment, interrupted medially and emarginate behind on each 

 side, four transverse spots on segments 2 to 4 and two trans- 

 verse spots on disk of segment 5 ; head closely and coarsely 

 punctured, more coarsely and sparsely so on vertex ; apical mar- 

 gin of clypeus with two small tubercles on each side of middle, 

 and between them a minute one; supraclypeal area with a 

 median, slightly swollen, impunctate line; mandibles 3-den- 

 tate ; mesoscutum coarsely punctured, the punctures separated 

 by about half a puncture width; wings dusky, the anterior 

 margin much more deeply so; second recurrent vein beyond 

 apex of second submarginal cell ; legs dark ; punctures of first 

 abdominal segment about as on mesoscutum; of segments 2 

 to 4 successively sparser; on fifth and sixth close; seventh 

 finely rugosopunctate ; segment 6 indistinctly medially carinate, 

 more distinct apically, segment 7 with a strong median carina 

 which projects slightly at apex. 



Type locality, Yuma, Arizona, June, 1905, Herbert Brown, 

 collector. 



Type, Cat. No. 20614, U. S. Nat. Mus. 



A paratype with only the label "Arizona" dififers in having 

 the impunctate line on supraclypeal area broader and more 

 elevated ; legs brown ; segment 5 immaculate. 



Date of publication, October 23, 1916. 



