1898.] NATURAL SCIENCES OF PHILADELPHIA. 53 



thorax with very large and close punctures, except a large area in 

 the middle, which is shining and impunctate; scutellum with large 

 punctures, except the anterior border, which is impunctate; post- 

 scutellum roughened ; basal enclosure of metathorax bounded by a 

 distinct rim, shining, with about sixteen strong ridges ; lateral faces 

 dullish, the triangle shining; tegulse dark brown; wings hyaline, 

 nervures and stigma black, stigma small, marginal cell appendicu- 

 late, second recurrent nervure considerably bent; second submar- 

 ginal cell extremely broad, larger than the third; legs black, with 

 yellowish-white, almost silvery, pubescence ; pubescence on inner 

 side of hind tarsi yellowish-white, except that the first-three joints 

 are tipped with shining orange-fulvous ; abdomen lanceolate, shining ; 

 first two segments very strongly punctured, the punctures on the second 

 smaller and closer than on the first; remaining segments with minute 

 inconspicuous punctures, and a more sericeous surface ; hind margins 

 of the segments with broad oppressed white hair-bands, all very con- 

 spicuous, that on the first more or less interrupted in the middle ; 

 some inconspicuous short black hair on the dorsum of the third to 

 fifth segments, and on the apex. 



$ . — 10? mm. long. Similar to the ? , but more slender. Face 

 much more narrowed below; antennae long, wholly black; space 

 between eye and base of mandible somewhat larger, but still broader 

 than long ; thoracic pubescence rather more highly colored ; hair- 

 baud on first abdominal segment entire. 



Hab. — Olympia, Wash., July 5, 1896, at flowers of Potentilla 

 palusiris; also June 30th, at flowers of lupine. A large and hand- 

 some species, but closely similar to several others. 



C. incequalis differs at once in the 9 , but the S is quite like our 

 insect, being however larger, with a longer stigma, and the face less 

 narrowed below. 



C. simulans (known only in the S ) is smaller «than kincaidii, and 

 has the abdomen uniformily punctured. 



C. gilensis has black hair on the thoracic dorsum. C. compacta 

 has quite a different metathorax. C. aestivalis differs by the brown 

 stigma, the much narrower second submarginal cell, the more 

 parallel orbits, the much smaller punctures of the mesothorax, the 

 very dark tegulre, the stronger punctuation of the third abdominal 

 segment, and the pale fulvous hair on the apical segment. The 

 aestivalis compared is an Illinois example from Mr. Robertson. 



