478 PROCEEDINGS OF THE ACADEMY OP [Sept., 



the caudal margin on the sides; ninth tergite dark brown, the caudal 

 margin broadly dull yellow; hypopygium reddish; sternites yellowish, 

 on segments four to eight becoming much darker, the caudal margin 

 broadly paler, more yellowish. Hypopygium (see Plate XVIII, 

 fig. 33) with the ninth tergite (see Plate XIX, fig. 47) thickened, 

 tumid, with a very deep shield-shaped notch continuing back almost 

 one-half the length of the sclerite, the lateral lobes rather pointed; 

 a prominent point on the middle line beneath, this directed caudad. 

 Ninth pleurite (see Plate XX, fig. 62) rather extensive, nearly com- 

 plete, the caudal margin produced caudad into a prominent lobe; 

 a subtriangular fleshy lolje (a) from the caudal margin of the pleurite 

 beneath, this lobe densely covered with prominent setiferous papillae 

 directed caudad and laterad; pleural appendages consisting of an 

 outer, rather larger, cylindrical, pale fleshy lobe which is provided 

 with numerous long hairs; inner appendage complex, consisting of a 

 broad, pale, flattened and very compressed lobe, suboval, with the 

 cephalic outer margin produced outward as a black, more chitinized 

 bar which is connected with the main lobe only at its base. Ninth 

 sternite deeply divided by a profound cut in which hang two pen- 

 dulous lobes from the ventral inner portions of the ninth pleurite, 

 these lobes with numerous long hairs at the tip only. Eighth sternite 

 almost straight across the caudal margin. Penis-guard very complex, 

 ventrall}^ near the tip with two sharp straight points on each side; 

 anal tube prominent, pale. 



Female. — Frontal prolongation of the head rather short, brown; 

 palpi short, dark brown. Antennae short, the two basal segments 

 rich brown, flagellum dark brown, unicolorous. Head rich brown, 

 an indistinct dark brown median vitta. 



Thoracic dorsum light brown with three dark brown stripes which 

 practically conceal the ground-color, the middle stripe very broad 

 in front, narrowed behind; scutum, scutellum and postnotum dark 

 brown. Pleura brown, rather lighter on the dorsal pleurites. Hal- 

 teres rather short, slender-stemmed, dark brown. Legs short, stout, 

 dark brown throughout. Wings uniformly brown; stigma oval, 

 dark brown; veins dark iDrown. Venation of this sex as in Plate 

 XVI, fig. 7. 



Abdominal tergites one to seven largely bright yellow above, the 

 lateral margins dark bro^vn; on the apical segments the yellow is 

 in the form of triangles whose point is at the base of the segment; 

 eighth and ninth segments dark brown; sternites rather dull yellow, 

 variegated with dark brown. Ovipositor with the tergal valves 



