144 Journal New York Entomological Society. [ Vo1 - xxvii. 



Holotype, J 1 , Porto Bello, February 15, 191 1 (August Busck). 



Type in the collection of the U. S. National Museum. 



This species is evidently allied to G. maestitia Alex, of Peru, but 

 is easily distinguished by the wing-pattern and venation. In maestitia 

 the sector and R 2+s are very short, r inserted on the very long R„; 

 deflection of R M distinct, subequal to r too long, about half of the 

 size m; cell 1st M 2 very long and narrow with the basal deflection of 

 Cu l at or beyond midlength. This species and G. laticincta run close 

 to G. subhyalina Alex, and form a group of nearly related insects. 



Gnophomyia olssoni new species. 



Antenna of the male elongated ; wings with a strong pubescence in the 

 apical cells ; tibiae and tarsi whitish. 



Male. — Length about 3 mm.; w r ing, 3.3 mm.; antennas about 2 mm. 



The type is mounted in balsam. 



Rostrum and palpi dark brown. Antennae of the male elongated, more 

 than half the length of the body, dark brown ; flagellar segments very elongate- 

 cylindrical, densely clothed with abundant stiff, erect hairs ; flagellar segments 

 gradually shortened toward the end of the antenna, the last segment about 

 one-third the size of the penultimate. Head brown. 



Thorax brown, the pleura more yellowish. Halteres brown, the knobs 

 darker. Legs with the coxae and trochanters yellowish-brown ; femora brown ; 

 tibiae brown passing into whitish at about one-third the length ; tarsi whitish, 

 the terminal segments broken. Wings with a strong brown tinge ; stigma 

 indistinct; veins dark brown; a very strong but sparse pubescence in the 

 apical cells. Venation (Plate I, Fig. 12) : Sc long, ending just beyond the 

 fork of the sector ; Sc„ at the tip of 5"^ ; Rs long, arcuated at origin ; R 2+3 

 about one-half the length of the sector ; r oblique, inserted on R 2 ; r-m long, 

 arcuated ; cell 1st M 2 small, closed ; basal deflection of Cu L nearly opposite 

 midlength of cell 1st M 2 . 



Abdomen dark brown, the sternites paler; hypopygium broken. 



Habitat: Panama. 

 Holotype, g, Rio Cana, Department of Bocas del Toro, September 

 2 5, I 9 I 7 (Axel Olsson). 



The generic reference may possibly be questioned by some, but 

 there is no other group that can receive this aberrant species. It 

 agrees with G. luctuosa O. S. in the strongly pubescent wings, but the 

 elongate antennae of the male is an unusual feature in the genus. I 

 take great pleasure in dedicating this interesting fly to its collector, 

 my intimate friend, Dr. Axel Olsson. 



