164 TRANSACTIONS OF THE [1892 



sternum and adjacent areas pubescent, with tlie meso 

 and meta-pleural segments yellow, the remaining pieces 

 and coxae bordered with yellow. Legs bronze pubescent, 

 femora yellow on the knees and partly on the sides, 

 sulcated; tibiae blackish, yellow on the inner side and 

 tips, set with stiff hairs; tarsi blackish, pubescent, yellow 

 on the sides, articulations and base of nails. Wing- 

 covers and wings hyaline, the veins stout and chiefly 

 black, the costal rib yellow along the middle line as far 

 as to the nodus, origins of the basal veins orange yellow, 

 the expanded vein of the clavus scabrous and coarsely 

 punctate, with an angular black spot beyond the base, 

 the radial cell large, wide, reaching beyond the middle 

 of the wing-cover, and its bent apex forming the base of 

 three ulnar cells, the cell below the radial one is narrow 

 throughout one-half of its length, and beyond this it is 

 greatly expanded towards its triangular tip, the cell 

 next below this is shorter, but quite wide, with its inner 

 vein strongly arched, and with a kind of triangular 

 fuscous nodus bounding its outer end; membrane and 

 adjoining margin of the mesonotum reddish orange, the 

 subapical cell acute fusiform, much shorter than the 

 second or true apical cell. Wings with the second and 

 fourth longitudinal sectors yellow to the middle, the 

 membrane dull yellow, longitudinally clouded with 

 fuscous, and with the thick vein similarly colored. 

 Mesonotum having a triangular yellow spot connected 

 with the lateral margin, the disk marked with four yellow 

 marks, the anterior of which form the posterior end of 

 the impressed loop, while the two a little farther back 

 are sagittate, and connected with the mesothoracie cross 

 by a slender line from each. Abdomen much longer and 

 narrower than in T. rimosa Say, black, polished, with 

 the edges of the segments, both above and below, bright 

 yellow ; apical flap of the last ventral segment, (male) 

 much narrower than the segment to which it is attached, 



