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



153 



distinct, a little shorter than 7? 2+3 ; Rs a little shorter than 7? 3 , petiole of cell 

 Mi moderate, about as long as R 2 + 3 ; fusion of Cu x and iW 3+4 subpunctiform. 



Abdomen reddish-yellow, tergites six, seven, and the basal two-thirds of 

 eight black, the lateral margins reddish, those of segment eight broadly so ; 

 sternites similar, segment seven black. Male hypopygium with the ninth ter- 

 gite extensive, the caudal margin with a deep U-shaped notch, the lateral 

 angles produced caudad into long straight arms that are heavily chitinized at 

 their tips, the inner face minutely and densely spinulose ; along the margin 

 of the notch of the tergite these spines are less numerous and much more 

 slender; sides of the tergite with numerous long hairs. Ninth pleurite small, 

 complete ; outer pleural appendage a semichitinized curved hook that is swollen 

 basally, blackened at the acute tip ; inner pleural appendage irregularly com- 

 pressed into a flattened blade whose cephalic margin is produced into two 

 short blackened points with a narrow rounded notch between them. Eighth 

 sternite on the caudal margin with a large flattened concave appendage that 

 is almost bifid medially by a deep notch, the surface with a dense white pubes- 

 cence, on the margin a long spine. 



Habitat: Panama (Darien). 



Holotype, J\ Rio Chico, Department of Panama, near the mouth 

 of the Rio Porcona, August 4, 1918 (Axel Olsson). 



T. spinicauda belongs to the group of T. longitarsis Macq. and 

 is to be confused only with T. appcndens (End.) of Ecuador and T. 

 tabida End. of Peru. The latter species has the antennae bicolorous, 

 the legs brownish-yellow and the eighth tergite black. T. appcndens 

 has the male antenna? nearly as long as the body (length 9 mm. ; 

 antenna 8.5 mm.), the legs brownish-yellow and the wing-pattern and 

 venation distinct. The similar T. aymara Alex. (Bolivia) and T. 

 parishi Alex. (Brazil) are readily distinguished by the male hypo- 

 pygia. T. longitarsis Macq. has a large brown mark near the middle 

 of the wine-disk on vein Cn. 



Explanation of Plate XVII. 



of Geranomyia nigripleura new species. 



of Peripheroptera subandina new species. 



of Dicranomyia jorgenseni new species. 



of Rhamphidia albitarsis fuscipes new subspecies. 



of Rhamphidia albitarsis fumipennis new subspecies. 



of Limnophila (Limnophilella) victor new species. 



of Eriocera argentina new species. 



of Eriocera columbiana new species. 



of Pcnthoptera sanctcr-marta new species. 



of Gonomyia (Gonoviyella) subcostata new species. 



