34 THE ENTOMOLOGIST. 



white. Between the bases of the intermediate and hinder coxse 

 on either side is a shining, round, white spot. 



The abdomen is very shining, and somewhat flattened from 

 above, being even indented in the middle at the apex. The 

 1st segment is black, and has a longitudinal slit in the middle of 

 the dorsum, and on either side a rounded, triangular white spot, 

 covered with white hairs ; the 2nd is black, the 3rd brown-yellow, 

 with black base ; the suture between this and the 4th is black ; 

 the remaining segments are brown-yellow, gradually passing over 

 to red-brown ; the ventral surface is paler, being even yellow 

 on the 2nd segment. 



The wings are tinged with brown, iridescent, narrow as com- 

 pared with their length ; the costal nervure is red-yellow, the 

 nervures enclosing the anterior portion of the anal cell (the 

 so-called lancet-shaped cell) and the transverse nervure in the 

 cell in question are yellow ; all the other nervures are black. The 

 stigma is also black, which is one of the chief points of difference 

 between this species and Tenthredo Uvida, L., in which the 

 stigma is pale brown or yellow. 



The four anterior legs are long and slender, the two posterior 

 being somewhat more robust. The anterior legs are yellow or 

 yellowish white, with a black line on the hinder side of the coxse, 

 apophyses, and femora ; the intermediate pair are somewhat 

 redder in tint, with similar black markings. The coxsb of the 

 hinder pair are black, spotted with white, as are also the apophyses ; 

 the femora are brown-red, with a broad longitudinal line on the 

 inner side ; the tibise are red with black apices, and are armed 

 with long red terminal spines. The tarsi have the first joint 

 black, the extreme base being red, the three following black, the 

 apical joint being red-brown; the colour of the tarsi, however, 

 differs in individual examples. (For the above description see 

 , figs. 9 and 10). The female is but little larger than the male, and 

 difi'ers principally on the following points : the abdomen is a little 

 broader, and the femora are somewhat thicker ; of the former the 

 first four segments are black, having the usual white spots a 

 little larger; the 5th, 6th, and 7th segments are brown-red, 

 the 8th and 9th castaneous or black. The sheaths of the saw 

 are black. 



The coxse are entirely black, but the apophyses have white 

 margins, and sometimes a white spot on the under side. The 



