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THE CANADIAN ENTOMOLOGIST. 365 



Legs moderate, luteous, dotted with piceous on femora ; apices of 

 femora and tibise piceous ; each tibia encircled with another transverse 

 ]Mceous band near base, less pronounced on posterior legs. Tibial spurs 

 as long as first two tarsal joints on anterior and middle legs, shorter on 

 posterior, moderately curved, rufo-piceous ; tarsi with third and fourth 

 joints and tip of the apical one piceous; claws slightly more than half 

 the length of last tarsal joint, rufo-piceous. 



Wings a little longer than abdomen, hyaline, the posterior margins 

 slightly incurved apically. Outer half of pterostigma luteous, inner half 

 fuscous. Apical third or more of intercostals forked in anterior wings, a 

 less number in the posterior wings. Veins hairy, the costa mostly luteous, 

 the subcosta fuscous, interrupted with luteous between transversals ; 

 other veins fuscous, less regularly interrupted with luteous. 



Anterior wings with a series of fuscous spots between the subcosta 

 and the vein immediately below it — these spots for the most part cover 

 the transversals ; a few rather large spots on anterior side of submedian 

 vein and one at its tip ; another spot at the tip of postcosta, near hind 

 margin ; smaller forks near apices of wings clouded with fuscous ; 

 posterior wings a little shorter and narrower than anterior, unspotted. 

 Posterior borders of both wings fringed with fine hairs. 



Male. — Length, i8 mm. ; expanse of wings, 33.5 mm. ; greatest 

 width of anterior wing, 3.8 mm. ; length of antenna, 4 mm. Somewhat 

 smaller than the female ; antennae less clavate ; appendages extremely 

 short (not discernible in this specimen except with a lens), blunt, luteous, 

 clouded with fuscous ; inferior triangular projection luteous, with long 

 dark hairs. 



Type. — No. 4370, U. S. National Museum. One female from the 

 college campus, Mesilla Park, New Mexico, June 13th. collected by Prof. 

 T. D. A. Cockerell. 



No. 4370a, U. S. National Museum. One male collected in Madera 

 Canyon, Santa Rita Mts., Arizona, June 14th, 1898, by Mr. E. A. Schwarz. 



Co-type. — One female collected at Fort Grant, Arizona, July 12th, 

 1897, by Mr. H. G. Hubbard. 



This species is remarkable on account of its small size and the 

 prominent spots on the anterior wings. The abdomen is marked very 

 much as in B. Sackeni. The short abdomen and inconspicuous append- 

 ages of the male are also peculiar. 



