138 INSi;CUTOR INSCITI^ MKNSTRUUS 



Thoracic dorsum with the prsescutum dull light gray with 

 a very broad brown median stripe, broadest in front, narrowed 

 behind; lateral stripes indistinct; a few scattered brown spots 

 on the interspaces indicating the position of hairs; scutellum 

 light gray, the middle of each lobe indistinctly brown ; scutel- 

 lum and postnotum light gray. Pleura clear blue-gray with 

 the dorso-pleural membranes dull yellow. Halteres pale with 

 the knobs brown. Legs with the coxae light gray ; the trochan- 

 ters pale ; femora yellowish brown, scarcely darkened at the 

 tip; tibiae yellowish brown, the apices narrowly dark brown; 

 tarsi dark brown. Wings subhyaline, the costal area dark 

 brown ; the stigma and a small spot at the origin of Rs brown ; 

 veins brown ; a broad vitreous band from before the stigma, in- 

 cluding the cord and extending into the base of cell M^. 



Abdominal tergites dark brown, the caudal and lateral mar- 

 gins paler, on the sixth to ninth segments brighter, more yel- 

 lowish ; the eighth segment and the apices of the lobes of the 

 ninth segment rather bright yellow; sternites dull yellowish 

 brown. Hypopygium with the ninth tergite rather conspicu- 

 ous, the lateral angles prominent, these lobes narrowed to the 

 blunt apex, the median notch U-shaped and bearing a slender, 

 subacute, median lobe which is directed caudad ; ninth pleurite 

 complete, moderate in size; eighth sternite with the caudal 

 margin shallowly concave, the tiny lateral lobes bearing three 

 to four stout, reddish, decussate bristles. 



The female is similar to the male, with the flagellar segments 

 not excised, the segments ranging from the yellow scape through 

 two or three basal segments of the flagellum which are light 

 yellowish brown to the dark brown of the terminal segments. 

 Ovipositor with the tergal valves transverse form an opaque 

 subrectangular plate, the blades acutely pointed, the dorsal sur- 

 face with a prominent ridge extending from the apex back- 

 ward ; the sternal valves are very slender, not reaching the tips 

 of the tergal valves, bent strongly outward at about midlength, 

 the tips bent inward and approximated. 



Holotype, male, Wolfe City, Texas, April 13, 1906 (F. C. 

 Bishopp). 



