280 £. T. CRESSO.V. 



antennje rufo-piceous at base: mesothorax deeply pitted, scutellum and meso- 

 pleura coarsely rugose ; metathorax coarsely reticulated, a patch of dense silvery- 

 grey pubescence on each side above the short acute spine; posterior margin of 

 prothorax, tubercles, and arcuate line at base of scutellum, yellow ; tegulfe dull 

 testaceous, pale in front; wings pale fusco-hyaline, in the posterior pair the anal 

 and discoidal cells are separated by a prolonged longitudinal nervure; legs fer- 

 ruginous, coxse, trochanters, extreme base of femora, line on posterior tibise within, 

 their tips more or less, and all the tibial spurs, fuscous or black ; abdomen rather 

 deeply punctured, closely so on apical segments, first and second segments above 

 each with a narrow yellow apical band, slightly interrupted on the middle of the 

 first and broadly so on the second, the third and fourth each with a transverse 

 lateral yellow spot. Length .28 inch. 



-^ . — " Head with occiput and clypeus silvery-white; antennse blackish-brown; 

 mandibles, three basal joints of antennae, hind angles of mesothorax, and the 

 tegulse, rust-red ; sides of metathorax above with dense yellowish-white pubes- 

 cence; of the golden-yellow bands on abdomen above, that on the first segment 

 only feebly narrowed at middle, shortly interrupted on the second, and the three 

 following interrupted into spots, the seventh segment terminates in two slender 

 rust-red tails. Length 8 mm." 



Hab. — New York. One 9 specimen ; % not seen. 



Nysson xapotecus n. sp. — J - — Black, opaque, covered with a silvery-grey 

 sericeous pile; clypeus clothed with silvery pubescence; head strongly punctured, 

 a short longitudinal ridge on inner side of each posterior ocellus; mesothorax, 

 scutellum and niesopleura deeply and coarsely punctured; basal middle of meta- 

 thorax above with short longitudinal rugte, the posterior face shining, with four 

 longitudinal carinse converging to apex, a patch of dense silvery pubescence on 

 each side above the short subacute spine; a line on posterior margin of prothorax, 

 connected with a spot on tubercles, spot on tegulse, a transverse line on base of 

 scutellum, and a rather broad apical band on abdominal segments 1 — 5 above, 

 subinterrupted on middle of four and five, yellow; wings hyaline, dusky at tips, 

 in the posterior pair the anal and discoidal cells are separated by a prolonged 

 longitudinal nervure; abdomen shining, sparsely punctured, more closely so at 

 base and apex. Length .26 inch. 



Hah. — Mexico, (Sumichrast). One specimen. 



Bfyssoii nieestus n. sp. — % .. — Black, opaque, clothed with a pale sericeous 

 pile, silvery on sides of face and clypeus; head and thorax coarsely pitted; the 

 space on inner side of posterior ocelli slightly protuberant; metathorax coarsely 

 reticulated, the spines prominent and subacute; wings fusco-hyaline, in the pos- 

 terior pair the anal and discoidal cells are separated by a prolonged longitudinal 

 nervure; extreme tips of femora, and the tarsi more or less, testaceous; abdomen 

 sparsely and rather finely punctured, more closely and deeply so on apical seg- 

 ments, the last segment above with two short teeth ; a narrow band on apical 

 margin of first segment above, interrupfed medially, a short line on each side at 

 apex of second segment, and a spot on each side of the third, pale yellow ; venter 

 shining, sparsely punctured. Length .25 inch. 



Hah. — Washington Territory, (Morrison). One specimen. 



Bfyssoii bellus n. sp. — 9-~Bl^ck, opaque, clothed with a silvery-sericeous 

 pile, most dense on face, clypeus and sides of metathorax ; head closely punc- 



