INSECUTOR INSCITI/E MENSTRUUS 12T 



segments reddish brown ; the flagellum broken. Head dull 

 gray, lighter gray on the anterior part of the vertex and ad- 

 joining the inner margins of the eyes. 



Mesonotal praescutum reddish brown, with four indistinct 

 dark stripes that are almost confluent behind ; scutal lobes 

 largely dark ; scutellum reddish ; postnotum gray. Pleura red- 

 dish, heavily light gray pruinose, the mesosternum darker. 

 Halteres brown. Legs with the coxae reddish, light gray 

 pruinose ; trochanters obscure yellow ; femora brown, more 

 yellowish basally ; a conspicuous yellow ring before the sub- 

 equal brown apex which is slightly enlarged, especially that of 

 the hind legs ; remainder of the legs yellowish brown, the tips 

 of the tibiae narrowly dark brown, the distal tarsal segments 

 dark brown. Wings subhyaline, the costal cell concolorous, 

 the subcostal cell slightly more yellowish ; wing-tip strongly 

 darkened, this including about the distal third of cells R^, R3, 

 7?5 and 2nd M, ; the outer two-thirds of M^ ; a small, dark 

 brown spot at the origin of Rs; stigma dark brown, sending a 

 conspicuous, narrow seam along the cord ; outer end of cell 

 1st M^ and vein Cm, likewise seamed with brown, the latter 

 suffusing most of cell Cit-^ ; veins dark brown. Venation : Rs 

 rather strongly angulated at origin ; r at the tip of R^ and on 

 R^ beyond midlength ; R., comparatively short and oblique so 

 cell Rn is very wide at the wing-margin ; deflection of ^4+5 

 gently arcuated, about one-half longer than /?2+3 1 cell ist Mr, 

 very small, only a little longer than wide, about as long as the 

 petiole of cell M^, the latter about one-half as long as the cell ; 

 the basal deflection of M^-[-^ is about two-thirds of the second 

 section of this vein (anterior margin of cell ist M._.) ; basal 

 deflection of Cu^ beyond midlength of cell ist Mo. 



Abdomen reddish brown, without distinct darker markings. 

 Male hypopygium of the general type of (/. sackcni but with 

 the pleural appendages remarkably distinct ; the outer ap- 

 pendage split into two branches that are divergent, the caudal 

 branch almost straight, shorter than the base of the appendage, 

 the apex obtuse and blackened ; the cephalic or inner arm is 

 nearly twice the length of the base of the appendage, sinuous, 



