MEXICAN HYMENOPTERA. 25 



niu] most of cheek.s in % , lemon-yellow; most of clypeus, 9 , fulvous ; 

 antennae black, with a broad white or yellowish annulus, and scape 

 yellowish beneath in % ; mesothorax ferruginous ; wings yellowish-hya- 

 line, nervures and stigma pale; tibife and tarsi yellowish, tips of tarsi 

 black. Form slender, surftice delicately punctured, finely and thinly 

 pubescent; head subquadrate. frontal foveas deeply impressed ; clypeus 

 strongly bisinuate anteriorly ; scutellum more or less prominently raised 

 into an obtuse tubercle, metathorax rugose, spines long and acute ; areo- 

 let triangular ; abdomen elongate, narrow, very slender at base. 

 Length 4 — 42 lines. 



Five S , two 9 specimens. (Sumichrast Coll. No. 57.) 



10. Hoplismenus acclivus, 11. sp. 



S . — Head yellow, with a black mark on vertex covering ocelli and 

 extending back on occiput; antennae black, scape beneath yellowish; 

 thorax above black ; margins of prothorax, a broad central stripe On 

 anterior portion of mesothorax, a line over tegulaj, scutellum, postscu- 

 tellum, flanks of metathorax, pleura except mark beneath wings, and 

 the tegulfe, yellow; wings yellow-hyaline, nervures and stigma pale; legs 

 yellowish, posterior femora behind, their tarsi entirely and tips of four 

 anterior tarsi, blackish; abdomen obscure yellowish; subapical spot on 

 first segment, large irregular mark at base of second, basal margins of 

 third and fourth, and the remaining segments entirely, black. Formed 

 and sculptured same as miaax. with the scutellum elevated into an acute 

 tubercle. Length 51 lines. 



One S specimen. (Sumichrast Coll. No. 95.) Closely resembles 

 711 ill It. c in shape and coloration. 



11. Hoplismenus esurialis, n. sp. 



S 9 • — Black ; head white, occiput and spot on vertex covering ocelli 

 and extending to base of antennas, black; antennae black, with a very 

 broad white annulus ; margins of prothorax, spot on each side of meso- 

 thorax behind, scutellum, postscutellum and tegulge, white; pleura and 

 metathorax honey-yellow, sometimes fulvous, the former with a black 

 line beneath tegulaj, and the latter with two large marks above, some- 

 times confluent with the base and with each other; wings hyaline, ner- 

 vures and stigma brownish ; legs pale honey-yellow, sometimes the pos- 

 terior coxa^, and the femora behind are dusky, tips of tai'si more or less 

 dusky ; abdomen black or fuscous above, yellowish beneath ; base of 

 first segment more or less, and narrow apical and lateral margins of all 

 the segments, pale yellowish ; basal fovea; of second segment pale. 

 Head large, nearly quadrate, cheeks full, convex ; antenuje long and 

 TiiANS. ami:r. knt. sor. ( 4 ) may, 18(58. 



