124 NORTH AMERICAN NYSSONIDAE (hYMENOPTERa) 



median ones no larger than the others; from the.se to the petiole a lOng and 

 narrow area is set off, which is divided by smaller carinae into a row of shallow 

 transverse cellules. 



Punctuation of the abdomen small, shallow and mconspicuous, though 

 rather close-set; it becomes coarser toward th" ap?x of each segment; second 

 ventral segment evenly convex, but not prominent at base; last dorsal seg- 

 ment with a pronounced median apical lobe between the two lateral teeth. 



Habitat.— BniTmu Columbia: Downie Creek in the Northern 

 Selkirk Mountains, August 9, 1905, one male, (the author). 



Type. — Cornell University no. 135.1. 

 Nysson (Brachystegus) moestus Cresson 



9. lilack; ai)cx of mitldle femora, and vague stripe in front and behind 

 on middle ti})iae, hind femora except extreme base, and sides of first abdominal 

 segment, rufous (Morocco red); apical stripe on each side of apex of first 

 four dorsal segments, buff (cartridge buff), those of the first almost continu- 

 ous, of the fourth very short; also an indistinct buff median line on the po.s- 

 terior margin of the pronotum. Most of the body with short appressed 

 silvery pubescence; each dorsal segment argenteo-fimbriate. 



Sculpture of head and thorax like that of the male; scutellum not mar- 

 gined, coarsely punctate; dorsal surface of propodeum meeting the posterior 

 medially at quite an angle, irregularly very coarsely reticulate, the two med- 

 ian meshes larger and deeper than the rest; posteri(5r surface with four 

 prominent oblique carinae. 



Second ventral segment {M'ominently convex at base, but not angulate; 

 pygidium long and narrow, distinctly margined, its surface longitudinally 

 rugulosc. 



California: Felton, Santa Cruz Mountains, May 20 to 25, 1907, one- 

 male, one female, (the author), [Cornell University]. 



Allotype.- — Cornell University no. 132.1. 



As may be noted from the above description, this female differs 

 from the male in l)caring some red on its legs and abdomen. 

 As it was captured at the same place (not necessarily on the 

 same day) and agrees in sculpture, I do not hesitate to describe 

 it as the femi\le of inoestu.';. The male agrees quite closely witli 

 the unique type specimen. 



For some reason this species has been omitted from Fox's 

 tables to our s])ecies. 



Nysson (Brachystegus) maculipes (Mickel) 



This species, a paraty])e of which is before me, is closely allied 

 to ?/?oc.s/(/.s'. liesides the characters mentioned in the key, which 

 I)i'esumably will be true foi- either sex, although the male of 

 /iKiciilipcs is as yet, unknown, the fcniMli's diri'er as follows: 



