Sept.. i9'3l Alexander: Ckanefi.ies from Colombian Axdes. 20!) 



which is chitinizcd on its apical margin. Central vesicle small with a promi- 

 nent apophyse directed dorsad and cephalad ; the penis is short and propor- 

 tionately thick, its walls with numerous transverse lines, the base of the penis 

 scarcely anterior to the central vesicle. Other prominent appendages of the 

 genital chamber are a pair of chitinizcd flattened pieces on either side of the 

 penis, on the dorsal margin produced dorsad into spoonlikc points. (See PI. 4, 

 figs. 2-4.) 



Holotype, <S, \'alle de las Papas. March 29, 19 12. 



Allotype, ?, with the type. 



Paratypes, 10 <S, March 22 to 29, 1912, with the type. One c? frrom 

 Almaguer, March 11, 1912. 



Variations: in some specimens, the shaft of each of the flagellar 

 segments is much paler, yellowish brown, than the swollen base. In 

 many individuals the thorax lacks the gray bloom which produces this 

 body color but this is probably due to the condition of the specimens. 

 Thew-ings of some with an indistinct subhyaline band beginning before 

 the stigma and running obliquely toward the base of the wing. 



The specific name is that of a native Indian tribe; spelled also 

 " carijona." They inhabit the banks of the upper Yapura River. 



T. carizona is related to moniliforviis Roder^ but I cannot identify 

 this as Roder's species. ' Moniliformis is described as having yellowish 

 and hyaline conspicuously diversified wings, whereas in carizona the 

 wings are pale brown with the whitish or subhyaline markings very 

 reduced. The thorax in moniliformis is brown without distinct stripes, 

 in carisona gray, vittate with darker; no mention is made in the de- 

 scription of moniliformis of the conspicuous trivittate condition of the 

 abdominal tergum. In monilifera Loew the wing pattern is also con- 

 spicuously diversified brown and white; here the caudal prolongation 

 of the 8th sternite is much shorter, the penis much longer and more 

 slender, the shapes of the 9th tergite and the median pleural appendage 

 quite different and the 9th sternite produced into a conspicuous median 

 lobe. 



20. Tipula monilifera Loew. 



1831. Tipula monilifera Loew, Linnaea Entomol., Vol. 5, p. 404; PI. 2, 

 figs. 26-27. 



One male from Popayan, March i, 1912, and another male from 

 the Valle de las Papas, March 29, 1912. 



1 Victor von Roder, Stctt. Ent. Zeit,, 1886, pp. 259, 260. 



