152 ME. E. E. AUSTEX ON ^"E■w DiPTEEors i>'SECTS. [Jan. 17, 



tapering some^^liat towards the sides and narrowly divided in the 

 median line ; in the median line the band is about three times as 

 far from the posterior margin of the segment as from the anterior, 

 and it may appear not quite to reach the lateral margins ; on the 

 fourth segment the ochraceous markings take the shape of a some- 

 what lunate mark projecting backw ards from the anterior margin 

 on each side of the median line, with a narrow piece projecting 

 obliquely from the base of each mark towards the lateral margin 

 on each side ; the inner margin of the '• lunate " marks is convex, 

 they extend about two-thirds the length of the segment, and are 

 obliquely truncated anteriorly and posteriorly ; the extreme base 

 of the segment is narrowly ochraceous from each "lunate " mark 

 to the side ; on the fifth segment the ochraceous marks are re- 

 presented by a stripe on each side of the median line, starting 

 from the anterif)r and reaching to the posterior margin, \\ ith the 

 inner side of each slanting outw ards posteriorly, so that the ground- 

 coloiu' between them constitutes a small triangle, \\hich is con- 

 tinued as a narrow median stripe to the anterior margin ; the ends 

 of the two ochraceous stripes are connected by a narrow and 

 indistinctly defined band near the posterior margin ; in addition 

 to this there is a small ochraceous triangle projecting from the 

 anterior margin of the segment on each side, between the stripe 

 and lateral margin, with its base connected with the stripe and its 

 apex situated at rather more than one-third of the length of the 

 segment ; sixth segment ^ith the median two-fourths of its hiiider 

 margin occupied by a 3-ello\\ish band, each end of which is 

 connected with the anterior margin by a shoi't ochraceous stripe. 

 The lateral prominences of the first abdominal segment bear a tuft 

 of ochraceous pile, mingled with blackish pile posteriorly ; the 

 remaining segments are sparsely clothed with very short black pile, 

 which becomes somew hat longer on the sides, especially in the 

 case of the fifth segment. 



Brazil, Santarem (Bates) : one specimen. 



There are also two males in the collection which I consider 

 to belong to this species ; but since they are in poor condition, I 

 have described the $ at greater length. 



S . Length 12| mm. 



liesemblhuf the $ , hut differing as follovs : — the most stril-inf/ 

 difference is presented by the eoloration of the vnnf/s ; these are 

 uniformly suffused with j:)rt7^ hroivn, which, though stronger in the 

 costal and darkest in the subcostal cell, sho\\"s only the very faintest 

 trace of concentration at the tip of the submarginal cell (none at 

 all in the second specimen in the collection, in \\ Inch the tint of 

 the wings is considerably lighter) ; the ivin^s, therefore, do not 

 present a blotched appearance ; the ^nngs are also considerably 

 narrower, the second longitudinal vein is straighter, and the 

 terminal poi'tion of the fourth vein, closing the first posterior cell, 

 much more oblique : the dark stripe on the thorax, on each side of 

 the narrow median cinereous one, is broader : the ahdomen is 

 hrowner,\\\e marl-'inf/s yeVo^rer; second segment yellower at the 



