the; ca-nadiax kntumulogist. 271 • 



Descril)c(l from Icn males collccled l)y Messrs. R. vS. vSliermaii. A. M. 

 Cauik'll, C. II. T. 'J'ownsciul and William I 'aimer, from Sa\-ary Island, 15. C, 

 Bear Lake, 15. C, Franconia X. II.. While .Mountains, Peaks of Otter, Va., 

 and (ireat Kails, \"a. 



Type, No. 2435f; "^ the U. vS. N. M., A\'ashin.i>ton. 1). C. Paratypes 

 in the National Collection at ( Jttawa. 



Ernestia sulcocarina s]). u. 



Pcscripfioii of male. 1 lead at \il)rissae about as thick as at ])ase of 

 antennae; \'il)rissae well al)o\e the oral margin. I'alpi yellowish at tip; intus- 

 cated below. Eyes hairy. Cheeks (below the eye) white pollinose on black 

 g'round. subshinini;" on the lower liair\ part, a row of bristles at the oral mar- 

 •^'m. Distance from the oral margin to base of eye equal to about one-third 

 the e}"e heii^'ht. .Sides of the face co\-ered with silvery pollen; bare; narrowest 

 width slightly less than the len^^th of the second antennal segment. Facial 

 ridges bristlv on knvest fourth. h'acial depression silvery pollinose, withcjut a 

 carina, .\ntennae reaching the lowest fourth of the face, the first and third 

 segments black', the second black, but usuallv reddish at distal end; third segment 

 about one and one-half times as long as the second. Arista thickened on 

 basal half, the ])enultimate segment somewhat longer than broad. Width of 

 front at narrowest point measuring less than the length ot the second antennal 

 .segment; the front silverv prjllinose ; frontal vitta didl, dark-brown, at the 

 narrowest point as wide as either side of front just cephalad of the ocellar 

 triangle. No orbital bristles; the ocellars proclinate ; the single row of frontal 

 bristles descending nearlv to the base of the third antennal segment. 



Thora.x subshining, black', covered with gra\' ])ollen ; scutellum gray pol- 

 lincjse on a black ground that becomes s()mewhat rufous toward the apex. 

 vStcrnopleurals variable, sometimes three, sometimes four; four dorsocentrals ; 

 scutelhnn with three marginal ])airs of macrochaelae and an apical cruciate 

 pair. Pegs black'; the middle tibiae with two or more bristles on the Iront side 

 near the nn'ddle, the hind tibiae without a comb-like row of bristles on the 

 outer side. Wings hvaline. R,,- (third \-ein ) willi a group ol two to li\-e hairs 

 i)oth above and below at the junction of R ..... Rend of M,,, with a minute 

 appendage in some cases. Tegidae white. 



iVbdomen subshining; silver\' pollinose on a black' ground. Discal and mar- 

 ginal niacrochaetae present on the second, third and fourth abdominal seg- 

 ments. The hind margin of the third segment arcuate. The tifth tergum 

 marked olt trom the shining sixth b\- a somewhat faint suture, laterall}' it is 

 about one-lourlh as long as the neighboring i)art of the foiu'th segment. The' 

 sixth and seventh abdonn'nal segments forming ])rominent genual segments. 



(icnitalia black. The basal part of the outer forceps with a broad, leaf- 

 like expansion. The basal ])art of the inner forceps with a median keel-like 

 projection and the edge of this projection fui'lhest remo\'ed from the penis is 

 sulcate. *t1?'"^t^^Jj 



The horseshoe-like indentiu'e extends about three-toui'ths of the dis- 

 tance to the base of the fifth sternite. 



Described from ten males t.aken bv Messrs. C. (^larrt'tt, .\. R. Raird 



