74 ENTOMOLOGICAL NEWS [xxxii, '21 



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

 (V. Weiser). Alloiupotyfe: 9, May 23, 1920. 



Gonomyia (Gonomyia) illicis sp. n. 



Antennae black, the scape orange ; thoracic pleura yellow with a 

 narrow dark brown longitudinal stripe ; halteres long, brown ; wings 

 tinged with gray; Sc very short, cell \st M2 open, basal deflection of 

 Cwl at the fork of M ; abdomen dark brown, the sternites yellow ; 

 male hypopygium with two pleura! appendages ; gonapophyses elongate, 

 needle-like. 



$ . Length about 4 mm. ; wing 4.6 mm. 9 . Length about 5 mm. ; 

 wing 5.8 mm. 



Rostrum and palpi dark brown. Antennae with the scape orange ; 

 flagellum dark brownish black. Head obscure yellow, the vertex marked 

 with darker. 



Pronotum light sulphur yellow, darker laterally. Mesonotum brown, 

 the lateral margins of the praescutum and scutum more yellowish ; 

 scutellum light brown, the caudal margin narrowly yellowish ; postno- 

 tum brown medially, the lateral margins of the median sclerite and 

 all of the lateral sclerites yellow. In the female ascribed to this 

 species the postnotum is yellow except posteriorly. Pleura yellow, more 

 obscure ventrally ; a narrow dark brown longitudinal stripe extending 

 from the lateral margins of the pronotum above the fore coxae, through 

 the base of the halteres to the abdomen ; sternites dark brown. Halteres 

 relatively long and slender, brown. 



Leg's with the coxae yellowish flesh color ; trochanters yellowish 

 testaceous ; remainder of the legs light brown. 



Wings faintly grayish ; stigma slightly darker, grayish brown ; veins 

 dark brown. Venation: Sc short, Scl ending far before the origin 

 of Rs, the distance being about two-thirds the length of Rs; Rs arcu- 

 ated ; R2+3 long, strongly arcuated, about twice R2 but shorter than 

 Rs; basal deflection of A'4+5 short; cell 1st A/2 open; basal deflection 

 of Cu\ at the fork of M. In the female, cell 1st M2 is closed in both 

 wings. 



Abdominal tergites dark brown ; sternites and the hypopygium obscure 

 yellow. Male hypopygium with the pleurites stout, the outer lateral 

 angle produced caudad into a slender, fleshy sctigerous lobe ; pleural 

 appendages two in number, one fleshy, the tip narrowly chitinized and 

 flattened into a small beak ; a row of about twenty stout setae along 

 its face ; the other appendage is fleshy, but at about two-thirds the 

 length there is borne a stout chitinized spine that is about as long as 

 the fleshy apex beyond it; the fleshy parts on the outer half of the 

 appendage are provided with abundant long bristles. Penis-guard long 

 and slender, the apex slightly bifid ; gonapophyses two, subtending the 

 penis-guard, these very long and slender, needle-like, the tips acute, 

 not attaining the ends of the guard. 



