226 



aijds. Although the thoracic pimcturation of this species fol- 

 lows the description of 0. monas of Molokai, yet the speci- 

 mens I have examined appear to present a more roughened 

 or coarser surface of the thorax than the one typical example 

 of 0. monas which I have been able to compare with these. 

 I have therefore hesitated to separate this Kau species from 

 0. monas because of the great similarity to the latter in form, 

 color and puncturation as described.* The constant very 

 darkly infuscate and violaceous blue iridescence of the wings; 

 the color of the mandibles and the somewhat deep and wide 

 depression of the second ventral abdominal segment, however, 

 induces me to consider it a different species, but allied to the 

 Molokai species. 



Odynerus litoraHs sp. nov. 



Black, with the clypeus almost entirely and the apical margins 

 of the first and second abdominal segments always broadly bright 

 yellow. A large frontal spot between the base of the antennae and 

 a f-maller one behind the eyes of the tame color. Thorax and abdo- 

 men when viewed laterally clothed with appressed sericeous pubes- 

 cence. Clypeus ample, angulate, apex depressed and acutely dentate, 

 deeply and broadly emarginate. Mandibles shiny black, the basal 

 tooth being emarginate at apex or with two cusps. Head and thorax 

 dull. Closely, evenly and deeply punctate, the minute system of punc- 

 turation being deep and distinct, more so in front of the head than 

 or mesonotum. Scutellum and post scutellum distinctly but less 

 evenly punctuate. Propodeum sub-rugose except the posterior con- 

 cavity which is rugulose and feebly and sparsely punctate. Abdo- 

 men with the basal segment unevenly and shallowly punctate; sec- 

 ond segment above simply convex, beneath, the costae are long, but 

 in most instances ill-developed, with the depression moderate, wide 

 at the base and shallow. Length, 8-9 mm. 



The female has the same coloration as the male excepting that 

 the clypeus is always black and the post scutellum sometimes spotted 

 With yellow. The structure differs in the clypeus, the apex of which 

 is less dentate and emarginate, the emargination, however, being very 

 distinct; in the thorax, which is less deeply punctate, and in the sec- 

 ond ventral abdominal segment, which has the costae stronger and 

 better developed. Length, 9-10 mm. 



Hab. — Waialua and Waianae (Kacna Point), Island of 

 Oahu, along the seacoast. 1 male. Wainae, April, 1907 (Gif- 

 frd) ; 9 males and 8 females, Waialua, March, April, May, 

 1911 (Giffard). Types in the author's collection. 



Obs. — This species is undoubtedly allied to 0. newelli 

 Pork, of Hilo, Island of Hawaii, and also to 0. smithii Perk. 



'Proc. Haw. Ent. Soc, H, No. 5, pp. 231-232. 



