4l>4 



Lower part of face above antennae with a median carina which 

 widens out above and dissipates a little above the level of the lower 

 corners of the eyes, the subquadrate, shallow, scrobal depression on 

 either side of this carina, limited outwardly at the corners by the an- 

 tennal socket and margin of the eye, with a smooth and shining sur- 

 face, and shows no trace of the dense shagreening present in odyneri or 

 s-K'cccyi except to a comparatively very slight extent around its outer 

 and upper margin ; upper part of the face above the scrobes much 

 more shagreened than in odyiicri and less shiny, the surface being dis- 

 tinctly and finely reticulate, and with numerous minute setiferous punc- 

 tures practically as in odyneri. although less prominent ; frontovertex 

 more distinctly shagreened, with the lines arranged fingerprint-like be- 

 tween and behind the ocelli ; the setiferous punctures somewhat more 

 prominent and mostly confined to the frons; sculpture otherwise as in 

 the female. 



The suberect pubescence on the frontovertex and upper part of 

 face somewhat thiimer than in odyneri. the tuft of fine pubescence on 

 the pedicel confined to the conical projection, the funicle joints with 

 coarser hair ; eyes with very sparse, short, erect hairs ; pubescence on 

 other parts of the body differing from odyneri as described for the 

 female. 



Length: (t.o8 to) 1.23; width of vertex at posterior ocelli: 0.216; 

 width of mesoscutum : 0.443 length of fore-wing: 1.03; wichli of fore- 

 wing : 0.483 mm. 



Coloration as in the female except tliat tlic antennae are slightly 

 more brownish. 



Described from 21.] females, !» males ( ry])e, all(>ty])e atid 

 paratypes) reared from two larvae of Odi/ncnis orhiis Per- 

 kins, Kipiika Puaiilu, Kilattea, Hawaii. Nov. iM and Nov. 

 28-29. 1919 (F. X. Williams), and 2 females (paratypes) 

 foimd alive in a sealed cell of this Odi/iieni,s- at the same local- 

 ity, Xov. 1, 1919 (Williams). From the tirst larva there 

 issued 2 $ S , 124 9 9 , and from the second (5 $ 3 , 

 104 5 9, this brood beino' incomplete as about 'l.") pupae 

 were killed by Acari. 



Xesmatia n. g. 



Closely related to Oocneyrtiis Ashmead and differs in the female se.x 

 as follows: Head of the same shape and structure, although slightly 

 thinner fronto-occipitally, antennae similar but the club somewhat larger ; 

 mandibles differing considerably in having three teeth, none very acute, 

 the middle one much the largest, the upper and lower teeth both rather 

 obscure, giving the appearance of a broad apex witli a single median 



