Ilynunopterous Genera Myzine and Plesia. 511 



Black ; tlie mandibles, flagellum, and apex of the liypo- 

 py^iiun dull fusco-ieriugiiiou.s ; the apex oi' the ejjipygiuiu 

 and the tegulai testaceous ; the spines of the tibial and tarsi 

 whitish. Wings pale yellowish brown, fusco-tenuginous iu 

 the radial cell, nervures daik fuscous. 



Length 12 nun. 



dial). Yunzalin Valley, Tenasserin (5<';?^/iam); Xovember. 



'i'ype in B. M. 



Plesia (^Mesa) extensa, sp. n. 



cT. Clypeus convex and subcarinate in the middle, sliglitly 

 advanced to the apex and very feebly and narrowly emargi- 

 jiate, finely punctured and clothed witii white pubescence. 

 Front punctured-rugose, vertex sparsely and rather shallowly 

 })Unctured, the prominence between the antennas bilobed, 

 ■widely but not deeply emarginate at the apex. Scape very 

 finely punctured, short and swollen, the lirst joint of the 

 flagellum concealed by the apex of the scape, the second not 

 as long as the scape, the third half as long again as the 

 second. Pronotum shining, finely and not very closely 

 punctured, narrowed anteriorly, the posterior margin arched ; 

 mesonotum and scutellum shining and sparsely punctured, 

 the mesonotum with two sulci on each side, the two inner 

 sulci deep and converging towards the posterior margin. 

 ]\Iedian segment coarsely transversely rugose ; propleurje 

 very finely, raesopleurse more coarsely punctured. Abdomen 

 shining, finely and sparsely punctured, slender and elongate; 

 the basal segment smooth, tully as long as the second and 

 tliiid combined, the basal half very narrow and depressed, 

 the apical half nodose, constricted at the apex ; the second 

 segment gradually widened from the base, a little longer than 

 the third ; the epipygium with a longitudinal carina. The 

 third cubital cell is about one-quarter as long again as the 

 second on the radial nervure ; tlie first recurrent nervine is 

 received just beyond the middle of the second cubital cell, 

 the second at two-fifths from the base of the third cubital 

 cell. 



Black ; the mandibles except at the apex, the extreme 

 apex of the interantennal prominence, a short, luirrow, trans- 

 verse line on each side at the apical angles of the four basal 

 abdominal segments, the basal joints of the tarsi, the anterior 

 tibiae, and the base of the posterior and intermediate tibiie 

 pale yellow, the apical joints of the tarsi fuscous. Wings 

 very pale fusco-hyuline, ucrvurea fuscous, the Icgulaj 

 testaceous. 



Length 12 mm. 



