248 



PSrCHB. 



[August — Decembei" 1SS9. 



by O- Fabricius, and seen by nobody 

 later, may nevertheless belong to this 

 species, as it is not credible that 

 O. Fabricius could have mistaken this 

 well known and striking insect. 



Race Yakima. 

 Calopteryx yakima Hag. n. sp.* 



Male, steel blue ; head dark ; labium 

 and antenna black ; tubercles of occi- 

 put blunt, short ; thorax brassy, sides 

 with a very fine, transversal, yellow line 

 above the legs ; upper appendages 

 black, strong, curved, with a number 

 of strong spines on the apical half exter- 

 nally, dilated on the same half inter- 

 nally, the dilatation beginning after a 

 tooth, tip rovmded ; inferiors a little 

 shorter, stout, somewhat flattened, on 

 tip, black ; yellow below on basal half: 

 last segment, and the segment before 

 the genital valves yellow below ; wings 

 liyaline, base a little yellowish, apical 

 third, a little more on hind wings black, 

 internally cut in a straight line ; vena- 

 tion black ; costa steel blue ; 22 to 30 

 antecubitals ; S transversals in the quad- 

 rangular ; feet black with long spines. 



Female, dark brassy green ; labrum 

 black on each side, with an oval vellow 

 transversal spot ; second joint of an- 

 tennae yellow at base externally ; sides 

 of thorax with larger yellow bands 

 above the legs, prolonged at the trans- 

 versal sutures; appendages black, long, 

 pointed ; abroad, yellow, dorsal band on 

 the penultimate segment, and a narrower 



*Yakima is a nomen proprium as uiatrona, inarga' 

 rita, sappho, etc. 



one on the last segment ; the final dor- 

 sal spine black ; valves yellow ; wings 

 as in the male, hyaline, more yellowish 

 at the front border to the nodus ; apex 

 blackish exactly in the same manner, 

 but not so dark, as all specimens are 

 younger ; pterostigma milk-white, zh, 

 mm. long. 



Hab. At a place called Lone Tree, 

 near the Yakima River in Washington 

 Territory, collected by mv assistants and 

 myself, 13 specimens, ^ of them males; 

 June 3oto Julv iS, 1S82 ; all more or less 

 with unfinished colois except two males, 

 which were among the first lot, col- 

 lected in June. 



Long Corp. "^i mm.; abdomen 40; 

 wings 32 ; tibia post. 1 1 . 



The discovery of a species of Calop- 

 teryx west of the Rocky Mountains, 

 was very unexpected and rather startling^ 

 the more as the species seemed to be 

 different from all known to occur in 

 North iVmerica. The nearest eastern 

 species is C. hudsonica from Michipi- 

 coten on the northern shore of the Lake 

 Superior and still farther east C. aequa- 

 bilis. During the last years my atten- 

 tion was drawn to the appearance of 

 western species in the eastern states, 

 namelv in the northern part of. western 

 New York. One of the most .striking 

 of my discoveries is the identity of Cor- 

 dulia lintneri collected from Center, 

 N. Y., with Lib. vacua Hag. (no 

 descr. ) from Saskatchewan and Lake 

 Winnipeg. I cannot but believe that 

 some of the northwestern species pass 

 east by the passage above Missoula, 

 Alontana, wliere the principal range of 



