﻿NO. iy NEW DIPTERA FROM PANAMA MALLOCH J 



four short bristles on apical third of ventral surface, dorsal surface 

 of hind tibiae with long hairs and one long bristle at about apical 

 third on same surface, hind tarsi with basal joint dilated, half as long 

 as second, basal and second joint with yellow ventral brush-like 

 hairs ; wings brownish, all thick veins distinctly infuscated along 

 margins, the large cross-vein most distinctly so, from humeral cross- 

 vein to end of first vein not one-half as long as from end of first 

 vein to end of second, last division of costa three-fourths as long as 

 penultimate, basal portion of third vein about one-half as long as 

 last portion of second, and distinctly, but not greatly, longer than 

 fourth vein between cross-veins, last portion of third vein very 

 slightly curved upward parallel with fourth and ending near to 

 wing tip, costa not extending beyond end of third vein, outer cross- 

 vein twice as long as inner, fifth vein very distinct before cross-vein 

 and carried half as far as the length of cross-vein beyond it, fourth 

 vein thick at extreme base beyond cross-vein and last portion and 

 rather distinct to wing margin, costal bristles long to end of first 

 vein; halteres brown. Length 1.5 mm. 



Locality. — Tabernilla, Canal Zone, Panama, Feb. 6, 191 1 (August 

 Busck). One female. 



Type.— Cat. No. 14943, U. S. Nat. Mus. 



LIMOSINA M-NIGRUM, new species 



Male. — Shining black ; f rons subshining on stripes where the 

 bristles are situated, the usual two divergent opaque stripes divided 

 by the subshining stripe where the central frontal bristles are in- 

 serted leaving an M-shaped velvet black frontal mark, lateral bris- 

 tles strong, the lower pair directed outwardly over eye, central rows 

 of three each inwardly directed, the lower bristles slightly the long- 

 est, basal antennal joint black with the usual bristles strong, third 

 joint brown, half as large again as basal joint, covered with short, 

 thick pubescence, arista dark brown, about one and one-half times 

 as long as breadth of frons, distinctly but sparsely pubescent, face 

 brown, distinctly produced in center, slightly concave in profile just 

 above mouth margin which is produced, cheeks opaque, pale brown- 

 ish, the anterior and second marginal bristles strong, the posterior 

 bristles much smaller, cheek at occiput more than twice as high as at 

 face margin ; mesonotum slightly gray-dusted, dorsal hairs long and 

 numerous, three pairs of dorso-central macrochaetse, the anterior 

 pair very widely placed, post-humeral bristles strongly incurved, 

 scutellum with two strong posterior marginal, two weaker median, 



