16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.73 



with a dark central streak in middle of apical three tergites. Wings 

 clear, with seven large dark brown marks as follows : An angulated 

 streak from stigma extending over inner cross vein, a subquadrate 

 spot on middle of fifth vein, a subquadrate mark on costa between 

 apices of first and second veins, which is carried over third vein at 

 less than one-half its width on costa, a similarly shaped spot at apex 

 of second vein, a sj)ot on apex of third vein which connects along 

 costa with one on apex of fourth, and a large spot enclosing outer 

 cross vein. Legs and halteres yellow. 



Frons subquadrate, all bristles except the ocellar pair long and 

 strong; arista rather distinctly pubescent; eyes rather abruptly nar- 

 rowed below; cheeks narrow. Thorax with three pairs of strong 

 dorsocentral, bristles, the anterior pair close to suture, a pair of long 

 prescutellar acrostichals, six series of intradorsocentral hairs, and 

 the intra-alar bristles very short ; sternopleura with one bristle. Fore 

 femur without an anteroventral comb, inner cross vein about two- 

 fifths from middle of discal cell. 



Length, 3.5 mm. 



One female, Cayuga, Guatemala, April, 1915 (W. Schaus). 



Type.— C^i. No. 40958, U.S.M.C. 



The black costal setulae extend rather near to apex of third vein 

 but do not attain it. 



MINETTIA BKUNNEICOSTA, new species 



Male and female. — Shining brown ; the head more clay yellow, with 

 frontal orbits and face gray dusted; thorax gray dusted, when seen 

 from behind with four darker vittae anteriorly, the outer vittae on 

 lines of dorsocentrals, the regions laterad of these darker; abdomen 

 almost without dusting. Legs brownish testaceous. Wings dark 

 brown on costal half, the dark color fading out posteriorly, and disap- 

 pearing behind fourth vein. Halteres brownish yellow. 



Frons nearly twice as long as wide, parallel-sided, all bristles 

 except the ocellar pair long and strong; arista long and slender, 

 finely pubescent ; eyes narrowed below ; cheek about as high as width 

 of third antennal segment. Thorax with three pairs of postsutural 

 dorsocentral bristles, one pair of presutural acrostichals, eight series 

 of intradorsocentral hairs, and the intra-alar quite strong; both 

 sternopleurals present. Fore femur without an anteroventral comb. 

 Inner cross vein beyond middle of discal cell. 



Length, 3.5-4 mm. 



Female and allotype, Cano Saddle, Gatun Lake, Panama, May 13, 

 1923 (R. C. Shannon) ; paratype male. Cacao Trece Aguas, Alta vera 

 Paz, Guatemala, April 21 (Barber and Schwarz). 



Type.—C2it. No. 40959, U.S.N.M. 



