94 PROCEEDINGS OF THE ACADEMY OF [1896. 



thorax very dark green, metatborax dark blue. Both bead and 

 thorax are very hairy, with short hairs ; the disc of metatborax 

 bare, and the disc of clypeus seeming bare, but seen, when side- 

 ways, to have a fine down. Head rather large, rounded, about as 

 broad as long. Vertex very finely granular, punctate ; sides of 

 clypeus punctate. Mandibles with the basal two-thirds very broad, 

 whitish, becoming rufesceut ; the terminal third black, compara- 

 tively slender, coming to a point. Antennie dark brown above,^ 

 yellowish beneath. Pale markings of fi\ce yellowish- white, restricted 

 to clypeus and sides of face. Clypeus high, pale with the usual dots^ 

 but with a dark blotch on each side above, so that the yellowish- 

 white color rapidly narrows, but instead of coming to a point,^ 

 broadens a little to an abrupt truncation on the upper clypeal mar- 

 gin. Lateral marks of face broadly triangular, the inner angle of 

 the triangle being opposite to the point on the clypeus where the 

 pale color suddenly narrows, and the upper angle (of about 30°) on 

 a level with the antennal sockets. 



Thorax with a very narrow yellow line on hind border of pro- 

 thorax, and a very small yellow stripe on tubercles. Mesothorax 

 dullish, granular. 



Tegulffi pale, testaceous ; wings milky-hyaline, nervures and 

 stigma very pale yellow, nearly colorless, the latter centrally hya- 

 line. Marginal cell moderately long and narrow, with its poststig- 

 matal portion a little the longer. Second submarginal rather large,^ 

 narrowed more than half to marginal, being not far from an equi- 

 lateral triangle. Third discoidal distinct. 



Legs pubescent, black ; the tarsi all white with a testaceous or 

 yellowish tinge; hind margin of first joint of hind tarsi blackish, 

 anterior knees and anterior tibia^ in front pale yellow. Abdomen 

 above shining piceous without markings, the hind margins of the 

 segments a little rufescent. Venter dark brown. 

 * Mut. 9 . — Clypeus all yellowish-white except the usual dots and 

 two ill-defined brown spots above. A semilunar dull yellowish su- 

 praclypeal mark. One specimen. 



Hah. — Las Cruces, N. M., Sept. 19, 1895, four specimens on 

 flowers of Aster canescens var. viscosus. Prof. E. O. Wooton took 

 one on the same flowers as late as the middle of October. 



A species found on Senecio doughmi. 

 58. Perdita senecionis n. sp. 



9 . — Length about 7 mm. Head and thorax dark, dull olive- 



