21-2 



PSYCHE. 



[May 1S9S. 



female, are narrowly brown on hind 

 margin, showing the incisures. 



It will be seen, by comparing descrip- 

 tions, that the present specimens have 

 (at least in the male) more golden 

 pollen on abdomen than the San Rafael 

 ("Vera Cruz) specimen, thus indicating a 

 tendency toward still another variety. 



GYMNOSOMATIDAE. 



(9) Gymnosoma fuligiiiosa Desv. One 

 male, August 31 ; and three females, 

 August 30 and Sept. 3 ; all on flowers 

 of Solidago canadensis on acequia banks 

 within the town of Las Cruces, taken by 

 the writer in 1897. The number of 

 specimens previously taken in New 

 Mexico is seven. 



OCYPTERIDAE. 



(10) Ocyptera eiicheiior Walk. One 

 male, August 31 ; and one female, Sept. 

 2 ; both on flowers of Solidago canadensis 

 on acequia banks within the town of 

 Las Cruces, taken by the writer in 

 1897. Length, 10 to 10^ mm. These 

 are additional to the specimen taken by 



Cockerell, August 5, 1897, on flowers of 

 Bigelovia zvrig/ttii in the Mesilla Valley, 

 and already recorded (Psyche, Dec, 

 1897, pp. 149-150). 



Mr. D. W. Coquillett, in his " Revision 

 of Tachinidae," calls this species O. 

 caroiinae Desv. I have no copy of 

 Desvoidy's Myodaires at hand to verify 

 this reference. 



14. Ocyptera eiiclienor var. dosiades 

 Walk. One female, August 25, on 

 flowers of Clematis ligustici/olia, on ace- 

 quia banks within the town of Las 

 Cruces, taken by the writer in 1S97. 

 Length, 7 mm. 



This is not the dosiades of Mr. D. W. 

 Coquillett, in his " Revision of Tachini- 

 dae," as it has the two pairs of marginal 

 macrochaetae, as well as the smaller 

 apical pair. It is the form which I 

 have heretofore always referred to dos- 

 iades Walk. When Mr. Coquillett ad- 

 duces some evidence to show that 

 Walker's types of dosiades possessed no 

 apical pair of bristles, and but one mar- 

 ginal pair, I will revise the present 

 determination. 



DESCRIPTION OF AN UNUSUAL SAW-FLY LARVA BELONGING 

 TO THE XYELINAE. 



BY HARRISON G. DYAR, WASHINGTON, D. C. 



As far as I can ascertain there is no Dalla Torre in his catalogue gives a 



description extant of any larva of the note stating that X'yela jiilii lives on 



subfamily Xyelinae of the Tenthredini- Bctula alba, but without reference to 



dae. Cameron says in his monograph any description, 

 that the larvae are without feet, and In the vicinity of New York there has 



