481 



a!o-ventral row of setae, and a broad dorsal stripe, frequent!}' divided 

 by a faint line or row of spots; tibiae yellow, with a dark stripe includ- 

 ing the cephalo-ventral setae ; tai^si and claws shining black ; wings 

 clear, with eleven postnodals in the front wing and nine or ten in the 

 hind; stigma pale brown, surmounting about one and one-half to two 

 and one-half cells; Mo arising between the third and fourth postnodal 

 cross-veins in the front wing and between the second and third in the 

 hind wing ; paraptera brown, caudal margins black. 



Abdomen black and buff ; terga i-io with broad black longitudinal 

 stripes, the lateral margins with broad pale stripes, the pale color ex- 

 tending well to the dorso-meson in the form of basal rings on segments 

 three to seven inclusive ; first tergum with a black spot near the latero- 

 ventral margin, terga three to eight with narrow apical black rings 

 reaching their lateral margins ; anal appendages black (Figs. 123, 124) 

 and reddish, the superiors compressed, the ventro-mesal margins with 

 large subbasal teeth and a few setae beyond these to the apical third; 

 inferiors shorter than the superiors, usually less than half the length 

 of the latter and provided with a fine brush of silken hairs; sterna 2-g, 

 inclusive, black, the tenth being pale and the first with a black median 

 spot. 



Female. — Color similar to that of the male. 



Head and thorax similar to those of the male. 



Abdomen with interrupted basal rings on terga 3—6, inclusive, 

 the lateral stripes broader than those of the male ; sterna 2-7 black, one 

 with a black median spot and eight with a median black stripe ; anal 

 appendages of the usual type; superiors black; ovipositor with a black 

 line along the ventral margin, the margins serrate ; prostyles dark, long, 

 and nearly straight ; ventral margins of the ninth tergum black imme- 

 diately dorsad of the ovipositor. 



Measurements 



Length, S 34-35 mm.' 



Length, 9 32-36 mm. 



Length of abdomen, S 28 mm. 



Length of abdomen, V 24-29 mm. 



Length of hind wings, $ 19-20 mm. 



Length of hind wings, 9 19-22 mm. 



Width of hind wings, S 4 mm. 



Width of hind wings, 9 4 mm. 



This species is distinguishable from disjunctus, to which it seems 

 most closely related, by the metepimeral spots ; the males, by the short- 

 ness of the inferior appendages. The compound eyes are blue in life. 



