XXxii, '21] ENTOMOLOGICAL NEWS 



Holot\pc: $, Ciudad, Province of Jujuy, May 22. 1920 

 (V. \Veiser). Allotoputypc : -9. Ftimtopotype : 6, May 

 25. 1920. 



Gononi\'ia illicis is related to (V. jejuna Alex. (Peru) but 

 differs in the structure of the male hypopvgium. 



Gonomyia (Leiponeura) trispinosa sp. n. 



Allied to G. cincrca; male hypopygium with three pleural appendages, 

 each of which bears a chitinized spine. 



$ . Length about 3.5 mm. : wing 4.3 mm. Belongs to the cincrca 

 group; allied to G. hclophila and other species. 



Head broken. Mesonotum clove-brown. Pleura brown, the dorso- 

 pleural region yellowish ; a narrow yellowish white longitudinal stripe 

 passing below the root of the halteres to the base of the abdomen, 

 this pale line bordered on either side by a dark brown margin. Halteres 

 short, brown.. 



Legs with the coxae and trochanters testaceous yellow ; fore and 

 middle legs broken ; hind femora obscure yellow, before the tips with 

 a narrow brown subterminal ring ; tibiae light yellow, conspicuously 

 tipped with black; metatarsi brown, the distal half and the remainder 

 of the tarsi black. 



Wings with a grayish yellow tinge, the costal and subcostal regions 

 paler yellow ; stigma indistinctly pale brown ; veins brown, the cross- 

 veins and deflections comprising the cord darker brown. Venation : 

 Sc short, Scl ending far before the origin of Rs, the distance being 

 greater than Rs alone ; Sc2 a short distance from the tip of Scl ; Rs 

 comparatively short, strongly arcuated at origin; inner ends of cells 

 R3, R5 and 1st M2 in alignment; cell 2nd M2 a little longer than its 

 petiole ; basal deflection of Cul at the fork of M. 



Abdominal tergites dark brown, the posterior margins of the seg- 

 ments broadly but obscurely yellowish; sternites more yellowish. Male 

 hypopygium with the pleurites rather stout; three pleural appendages, 

 each of which bears a sharp blackened spine; ventral appendage longest, 

 produced caudad as a flattened, ribbon-like blade, the tip narrowly 

 darkened, obtuse; near the base of this lobe on the proximal face a 

 short but acute slightly curved black spine; intermediate appendage a 

 short, slightly curved black spine of approximately the same shape and 

 size as the one just described; dorsal pleural appendage a fleshy lobe 

 whose caudal angle is produced into a very long, strong, chitinized 

 hook that is several times larger than either of the two spines just 

 described ; the blackened apex of this hook is bent almost at a right 

 angle to the base; the base of the appendage bears several powerful 

 setae. Gonapopyhyses and penis-guard elongate but of simple structure 

 as in this group of species. 



Holotype: $, Ciudad, Province of Jujuy. May 22, l (> 2n 

 (V. Weiser). 



