510 Mr. R. E. Turner on the 



of the basal segment sliglitly concave ; the epipygium sub- 

 opaque, ratlier sparsely punctured, some of the punctures 

 coiitiuent longitudinally near the apex. The second cubital 

 cell is full three-quarters as long as the third on the radial 

 iiervure, the radial cell is very narrowly separated from the 

 costa at the apex, the second recurrent nervure is received 

 at three-tifths from the base of the third cubital cell. 



Black ; the pubescence grey and very sparse ; the apex of 

 the pygidiura narrowly testaceous ; the spines of the tibige 

 white, those of the tarsi very pale ferruginous. Wings 

 fusco-hyaline, flushed with purple, darkest towards the apex; 

 nervures black. 



Length 12 mm. 



Jlab. Salween Valley, Tenasserim (^Bingham)', July. 



Type in J3. M. (ex. coll. Bingham). 



Plesia (Mesa) ustulata, sp. n. 

 ? . Clypeus very finely and closely punctured ; the head 

 punctured, finely and sparsely on the vertex and round the 

 ocelli, closely and coarsely on the front, a shallow longitudinal 

 sulcus between the antennae reaching halfway to the anterior 

 ocellus; the scaj)e shining and punctured, with sparse, pale, 

 fulvous pubescence beneath, the flagellum except the basal 

 joint opaque. Pronotum rather deeply, but not very closely 

 punctured; mesonotum shining, very sparsely punctured, 

 almost smooth on the disc, with two longitudinal sulci on 

 each side, the outer one very shallow and indistinct; the 

 scutellum shining and very sparsely punctured ; propleuras 

 punctured rugulose, mesopleurae closely and not very coarsely 

 punctured. Median segment very finely and closely punc- 

 tured, with a broad groove from the base to the base of the 

 oblique posterior slope, which is not abruptly divided from 

 the dorsal portion of the segment, the sides closely obliquely 

 striated. Abdomen shining, finely punctured, sparsely on 

 the two basal segments, more closely on the others; the 

 epipygium finely punctured at the base, finely longitudinally 

 striated before the apex, which is broadly rounded, the apical 

 margin rather broadly smooth ; the petiole of the basal 

 segment broader than long. Tiie first recurrent nervure is 

 received at the middle of the second cubital cell, the second, 

 which is broadly but not very strongly curved outwardly, a 

 little beyond the middle of the third cubital cell. The second 

 cubital cell is long on the radial nervure, slightly longer than 

 the third ; the second and third transverse cubital nervures 

 oblique, very slightly bent close to the cubital nervure; the 

 rudiai ceil obliquoly truucute at the apex. 



