INSECUTOR INSCITI^S MENSTRUUS 77 



Male. — Length, 7 mm. ; wing, 8 mm. 



Rostrum and palpi black. Antennae with the first segment 

 of the scape black; remainder of antenna broken. Head dark 

 brown. 



Pronotum yellow. Mesonotal praescutum yellow without dis- 

 tinct darker markings, near the suture with a faint infuscation 

 in the region occupied by the usual interspaces ; scutum yellow, 

 the centers of the lobes dark brown ; scutellum yellow, mar- 

 gined with dark brown ; postnotum with the median sclerite 

 brown in center, fading into obscure yellow laterally. Pleura 

 yellow with a very ill-defined, longitudinal, brown stripe. 

 Halteres pale, the knobs light yellow. Legs with the coxae 

 and trochanters greenish yellow ; femora brownish yellow with 

 a narrow but conspicuous, dark brown ring that is a little more 

 than one-half as wide as the yellow tips ; tibiae dark brown, 

 the bases very narrowly obscure yellow ; tarsi dark brown. 

 Wings yellow, the costal region more saturated ; wing-membrane 

 extensively marbled with brown, this appearing as five ill- 

 delined fasciae; the first fascia lies in the bases of cells R and 

 M ; second fascia near mid-length of cell R, extending across 

 cells R, M and less clearly in Cti and the anal cells ; third 

 fascia broad, extending from the origin of Rs, along the sector 

 to the end of Sc^, continued caudad along the cord and less 

 distinctly across the distal third of cells R, M and the end of 

 cell Cu; the fourth fascia includes the small stigma at r and a 

 broad seam along the outer end of cell ist M^ ', the terminal 

 fascia occupies the wing-tip ; anal cells pale brown with cream- 

 colored spots ; anal angle pale ; veins brown, more yellowish in 

 the pale areas. Venation: Sc very long, Sc-^ ending just before 

 the end of Rs, Sc^ about five times as long as ^Cj, ending some 

 distance beyond the end of Rs ; Rs arcuated ; r a little less than 

 twice its length from the tip of i^i ; cell ist Mo elongate, widened 

 distally ; m arcuated, about three-fourths the outer deflection 

 of M^ ; basal deflection of Cu^ at the fork of M. 



Abdominal tergites dark brown, the sternites obscure yellow ; 

 hypopygium obscure brownish yellow. 



Habitat. — Formosa. 



