6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



The two species are before me, and I readily agree that the Battle 

 Creek specimen is atra. The other, of which Doane figured the wing, 

 and to which I restrict the species, seems to me to be distinct. I 

 have several western specimens agreeing with the type, and I have 

 seen no specimens of typical atra from farther west than the Michigan 

 one noted as a cotype of anthracina. The differences are slight but 

 seem constant in western material. 



Briefly stated, the hyaline interval between the first and second 

 wing bands is wide behind in atra, narrow in anthracina, and the 

 mesonotum has more of the flattened white hairs in the latter. In 

 atra there is a single transverse row of hairs in front of the suture, 

 separating the anterior and posterior lateral polished mesonotal areas; 

 while in anthracina there are two more or less distinct rows; the 

 central area behind the suture, usually spoiled by the pin, has only 

 about four rows of hairs in atra, about six in anthracina, which spread 

 laterally in front of the scutellum in a dense or double row, where 

 atra has only a thin single row. The National Museum has the 

 following: Three females, Tennessee Pass, Colo., July 25, 1917 

 (Aldrich); one male, Colorado; one female. Rabbit Ear Pass, Colo., 

 July. All the preceding agree with the type very closely. 



The types are in the collection of the Washington State College, 

 Pullman, Wash. 



PROCECLDOCHARES GRINDELIAE, new species 



Male and Jemale. — Like atra, but differing in having the middle 

 region of the mesonotum from near the front to the scutellum prac- 

 tically covered with appressed pale yellow hair not in distinct rows, and 

 extending outside the dorsocentral bristle. The usual rounded pol- 

 ished spot on each side above the root of the wing is divided by the 

 extension of these hairs from before^ more than halfway to the scu- 

 tellum. While these hairs are stout enough to be conspicuous, they 

 are not distinctly flattened. The wing pattern is like that of anthracina, 

 the pale area between the first and second dark bands being narrow 

 at the hind margin, and not widening rapidly as in atra. 



Length, male 3 mm., female 5 mm. 



Described from nine specimens of both sexes, reared at Alameda, 

 Calif., from Grindelia rohusta, presumably by Koebele many years 

 ago. No record is obtainable as to the nature of the gall, but the 

 plant is named on the label and several puparia are connected with 

 the specimens. Another female was taken by Cockerell at Halfway 

 House, Pike's Peak Trail, Colo., September. 



Type. — Male, Cat. No. 41491, U.S.N.M. One paratypeis placed in 

 the California Academy of Sciences. 



