June-Sept., 1919.] ALEXANDER: NEOTROPICAL CRANE-FLIES. 139 



yellow with two very broad dark brown stripes, the dorsal one much broader 

 than the narrow ventral stripe, which, in turn, is still narrower than the pale 

 vitta enclosed. Halteres short, dark. Legs with the coxae pale, excepting the 

 outer face of the fore coxa and the extreme base of the middle coxa which 

 are dark colored ; trochanters dull yellow ; femora dull yellow, darker near 

 the tips; tibiae and tarsi dark brown. Wings with a strong grayish-brown 

 suffusion, darkest on the anterior half, in cell R 3 and along the cord ; stigma 

 oval, dark brown, situated in the pale cell R v Venation (Plate I, Fig. 11): 

 Sc moderately long, ending before the origin of the sector, the distance be- 

 tween them a little greater than the basal deflection of R t +^; inner end of cell 

 1st M a pointed ; basal deflection of Cu x just before the fork of M. 



Abdominal tergites brown, paler sublaterally, the lateral and posterior 

 margins dark ; sternites dull yellowish-brown, darker posteriorly. Hypopy- 

 gium with the pleural pieces short and stout, the outer angle (ventral apical 

 appendage) produced into a slender slightly curved chitinized hook that is 

 about one and one-half times the length of the pleurite itself and much longer 

 than the pleural appendages, on the outer face near the base with a small 

 setigerous tubercle. Dorsal apical appendage elongate-cylindrical, fleshy, with 

 rather numerous long hairs; internal apical appendage semi-flattened, the inner 

 margin with numerous stout spines that are more powerful at the tip of the 

 organ. Gonapophyses short but powerful, the dorsal pair smooth with about 

 four chitinized points, the largest pair of which are bent dorsad, the ventral 

 pair more slender and directed caudad. Ventral gonapophyses terminating in 

 two short chitinized teeth that are separated by a deep V-shaped notch, the 

 face with numerous setigerous tubercles. 



Habitat: Panama (Darien). 



Holotype, <£, Real de Santa Maria, Department of Panama, April 

 10, 1918 (Axel Olsson). 

 Allotopotype, J. 

 Paratopotypes, 10 <£ ^- 



Gonomyia (Leiponeura) producta new species. 



Generally similar to G. (L.) scimitar Alex.; outer angle of the pleurite of 

 the hypopygium produced into a slender cylindrical fleshy lobe. 



Male. — Length, about 3 mm. ; wing, 3.2 mm. 



Rostrum and palpi dark brown. Antennae dark colored. Head dark. 



Mesonotum rich brown, the praescutum margined with yellowish ; the 

 centers of the scutal lobes dark brown, the median area bright yellow ; scu- 

 tcllum orange, darker basally ; postnotum yellow with the center darker. Pleura 

 dark purplish-brown with a broad yellow longitudinal stripe. Halteres short, 

 yellow. Legs with the coxae dark purplish-brown; trochanters dull yellowish- 

 brown, the remainder of the legs broken. Wings subhyaline ; stigma indis- 

 tinct ; veins yellowish-brown. Venation about as in G. puer Alex, and 

 related species; Sc rather short, ending before the origin of the sector; veins 



