Nc-zc Sf^ccies of Sierola, With Explanatory Notes. 85 



with a triangular area at the base smooth and shining; abdomen elongate 

 ovate, smooth and polished: wings subinfuscate. with a faint yellowish 

 brown pigmentation ; length 3 mms. 



$ with the head and abdomen shorter, the latter bluntly pointed api- 

 cally, wings deeply pigmented. 



Described from four females and live males (type, allotype and para- 

 types). Type and allotype collected on Tantalus mountain, Oahu, 1500 ft. 

 e'lev., by W. M. Giffard. December 22, 1918; 2 $ $ and i 9 collected on Ma- 

 noa Ridge, Oahu, by D. T. Fullaway. February 13, 1917; i $ collected on 

 Waialae Ridge, Oahu, by O. H. Swezey, April 22, 1917; i 9 collected on 

 Manoa Clififs, Oahu, by P. H. Timberlake, September i, 1918; i <? collected 

 on Tantalus mountain, Oahu, 1500 ft. elev., by W. M. Gififard, August 27, 

 1918; I $ collected on IManoa Clififs. Oahu, by P. H. Timberlake, March 29, 

 1918, paratypes. 



Type : Cat. No. 26, Bishop Museum. 



27. Sierola brevicornis n.sp. 



9 moderately flat, slender, and shining, almost brilliant, black ; legs and 

 antenns basally luteo-testaceous, the latter fuscous outwardly, mandibles red- 

 dish brown except at the base. 



yead and thorax to the propodeum with a microscopically fine reticu- 

 late surface sculpture, coarsely, shallowly and remotely punctate and hairy. 

 Head a little longer than wide, width between the eyes more than the length 

 from eye to vertex ; flat above, depressed a little in front, and a little tumid 

 beneath, the greatest depth behind the eye ; vertical margin straight, temples 

 rounded, eyes convex, antennae a little longer than the head, all the segments 

 of the flagellum as wide as long with the exception of the pedicel, which is 

 a little longer, antennal fossae deep ; clypeus short, medially longitudinally 

 elevate, sloping at the sides, depressed apically and slightly projected in 

 front of the anterior margin of the head ; mandibles slender, curved, con- 

 cavo-convex, truncate apically and toothed, base not reaching the eye ; cheeks 

 very narrow ; gula and sides of the head flat, the former medially fore- 

 .shortened, wider than long, anterior margin arctiately curved, posterior mar- 

 gin incised ; propodeum hardly rugulose, a little more coarsely sculptured 

 than the head and thorax in front ; abdomen elongate ovate, smooth and 

 polished ; wings subinfuscate ; length 2.75 mms. 



Described from one female (type) collected at Kaumuohona, Oahu, by 

 P. H. Timberlake, June 4. 1916. 



Type : Cat. No. 27. Bishop Museum. 



28. Sierola uiontana n.sp. 



9 brilliant black, legs and antennae basally luteo-testaceous. the latter 

 fuscous outwardly ; mandibles testaceous. 



Head and thorax with a microscopically fine and delicate reticulate 

 surface sculpture ; finely, shallowly and somewhat remotely punctate, hairy 

 clothing short and inconspicuous. Head as wide as long, widest across the 

 eyes, which are slightly bulging, short behind the eyes, width between the 

 eyes twice the length from eve to vertex • convex above, depressed in front. 



