THE CANADIAN ENTOMOLOGIST. 24 



Q 



and some coarse black spines (most of which latter are black, the rest 

 luteous) ; tibiae each with a transverse piceous line on outer side near 

 base ; sometimes clouded with piceous at articulations with femora ; 

 ringed with piceous at their apices. Tibial spurs as long as first two 

 tarsal joints, in anterior and middle legs (in posterior, somewhat shorter) ; 

 slightly curved, rufo-piceous. Tarsal joints piceous at their apices ; 

 claws considerably more than half the length of last tarsal joint, 

 moderately curved, rufo-piceous. 



Wings of moderate size, hyaline, the posterior margins sinuate 

 apically ; venation hairy. Pterostigma small, luteous, reaching forward 

 only half way to the costal margin. Intercostals in apical half of anterior 

 wings forked, a somewhat less number forked in posterior wings. Veins 

 luteous, interrupted, principally at junctures with other veins, with fuscous. 



Anterior wings with series of small fuscous spots or cloudings, 

 principally along anterior side of submedian vein and posterior side of 

 the first longitudinal vein above it ; a few spots and cloudings also at tip 

 of submedian vein, at bases of smaller forks, and along veins near 

 posterior border ; posterior wings quite a little shorter than anterior, 

 immaculate. Posterior borders of both wings fringed with fine hairs. 



Female. — Length, 28 mm.j expanse of wings, 49.5 mm.; greatest 

 width of anterior wing, 6.3 mm.; length of antenna, 6 mm. 



Antennas more clavate than in male. Abdomen a little shorter than 

 wings ; marked similarly to that of the male, but the mid-dorsal stripe 

 exists on all the segments, while the mid-ventral stripe of basal segments 

 is absent. Tip of abdomen luteous, clothed above with long black hairs ; 

 superior parts split ; inferior part beset with coarse, blunt, black spines ; 

 below, two small cylindrical luteous appendages, three times as long as 

 broad, with some very long, black hairs or bristles. Anterior wings 

 almost immaculate, a few very small faint cloudings along submedian and 

 post-costal veins. 



Type. — No. 4070, U. S. National Museum. One male specimen 

 collected at Fort Grant, Arizona, July 22, 1897, by Mr. Henry G. 

 Hubbard. 



No. 4070 a, U. S. National Museum. One female, with same locality 

 and date, collected by Mr. Hubbard. 



A handsome little species, resembling somewhat, in general appear- 

 ance, B. abdoniinalis (Say). 



