AMERICAN HYMENOPTERA. 



275 



Paranysson mexicanus n. sp. — 9 -—Black, opaque, clothed with a very 

 short dense silvery-ochraceous pubescence, most dense and sometimes golden on 

 face, clypeus, cheeks, posterior margin of prothorax, tubercles and sides of meta- 

 thorax above ; head deeply punctured, mandibles rufo-piceous ; mesothorax deeply 

 and coarsely punctured, with a well impressed central longitudinal line ; scutellum 

 and mesopleura coarsely continently punctured, the latter with a short subacute 

 tooth beneath tegulse; basal middle of metathorax above covered with appressed 

 ochraceous pubescence, the very prominent, strongly divergent, acute lateral spines 

 tipped with yellow ; tegulse, tips of four anterior femora and their tibise in front, 

 dull rufo-testaceous ; wings subhyaline, in the posterior pair the anal and discoidal 

 cells are separated by a prolonged longitudinal nervure ; all the tarsi and posterior 

 tibiae more or less rufo-fuscous ; abdomen sparsely and rather strongly punctured, 

 covered with a dense golden-yellow pile, that on base of first segment above 

 ochraceous; posterior margin of segments 1 — 5 above narrowly yellowish, slightly 

 dilated on the sides, the sixth segment with a large yellowish spot cov.ering nearly 

 the whole upper surface; apical margin of all the segments, except the last, with 

 a narrow fringe of dense golden-yellow pubescence; venter with silvery-ochraceous 

 pubescence, the second segment deeply punctured. Length .40 inch. 



% . — Like the 9 , except that the clypeus and thorax beneath are densely 

 silvery; the sixth abdominal segment above has a rather broad golden-yellow 

 band at tip, and the seventh segment fulvous, except base, carinate laterally 

 and terminated by four teeth, the two middle ones longer and slightly divergent. 

 Length .40 inch. 



Hab. — Mexico, (Sumichrast). Nine specimens. 



NYSSORI Latr. 

 Mesotliorax more or less deeply and coarsely punctured. 

 Space between ocelli not raised. 

 Legs ferruginous. 



First abdominal segment with a large dilated yellow or fulvous spot on 



each side; wings fuscous; size large plagiatus n. sp. 



First abdominal segment with a rather broad yellowish band on posterior 

 margin, interrupted medially, but not dilated laterally : wings fuscous; 



,. ,, f ? aiiriiiotiis Say. 



size medium or small :. 1 .. ^ 



' ? teqiialis Patton. 



Legs black, with the four posterior femora more or less ferruginous; abdomen 



with narrow interrupted white bands; wings clear: size rather small, 



form robust coiiipactiis n. sp. 



Legs mostly black; (all the remaining species of small size). 



Tibise with a white line above alboiiiarginatiis n. sp. 



Tibise entirely black aztecilS n. sp. 



Space between ocelli more or less protuberant at the sides. 



Abdomen black, with transverse yellow or white bands. 



Legs ferruginous. 



Basal middle of metathorax with evenly spaced longitudinal earinse; 



abdomen deeply and coarsely pitted iiiellipes n. sp. 



Basal middle of metathorax coarsely reticulated ; abdomen less deeply 



punctured opuleiittis Gerts. 



Legs black. 



Thorax with yellow lines and spots ; abdomen with entire yellow bands. 



zapotecns n. sp. 



