INSECUTOR INSCITI^ MENSTRUUS 131 



light brown ; the two distal segments dark brown. Frontal 

 prolongation of the head rather elongated, light brown, the 

 nasus prominent. Antennae with the first two segments light 

 yellow; the third segment light brown; remainder of the an- 

 tennae black, the segments slightly excised. Head pale brown- 

 ish yellow with a sparse blue-gray bloom, less distinct on the 

 sides of the occiput ; an indistinct brown median vitta. 



Pronotal scutum yellowish gray with a brown median spot. 

 Mesonotal prsescutum light gray with four narrow dark brown 

 stripes, the middle pair divided by a subequal vitta of the 

 ground-color and beginning behind the anterior margin of the 

 sclerite; a yellowish spot before the pseudosutural fovese; 

 scutum with the lobes gray, indistinctly marked with brown ; 

 scutellum pale brown, the postnotum gray, both with a very 

 indistinct median brown vitta. Pleura with a light gray bloom, 

 the dorso-pleural membranes and a blotch before the base of 

 the halteres yellow. Halteres yellowish brown, the knobs 

 darker. Legs with the coxae light gray; trochanters dull yel- 

 low ; femora and tibiae yellow, the apices indistinctly darkened ; 

 tarsi brown. Wings subhyaline to grayish, the costal region 

 more yellowish; stigma indistinct; veins dark brown; a vitre- 

 ous band before the cord extending into the base of cell M^. 



Abdominal tergites dull yellow, indistinctly trivittate with 

 brown, the sclerites narrowly ringed with yellowish silvery on 

 the caudal margin ; ninth tergite light brown narrowly mar- 

 gined with yellow ; sternites dull yellow with the median area 

 darker, this pattern broadest on the terminal sclerites. Hy- 

 popygium with the ninth tergite large, transverse, with short, 

 subacute, lateral lobes, the caudal margin with three notches, 

 the median one shallowly concave, the lateral notches deeper, 

 subrectangular ; ninth pleurite complete; ninth sternite deeply 

 notched medially beneath, the base of the notch on either side 

 with a sharp, elongated appendage that is directed dorsad; 

 eighth sternite with prominent fleshy lobes directed proximad, 

 provided with finger-like projections that almost meet on the 

 median line beneath; the caudal margin with a median sub- 

 membranaceous shield bearing a weak tuft of pale hairs. 



