232 



the abdomen are verv widely (consistently so) of the same color, 

 whilst in its allies these latter are very narrowly whitish yellow 

 and in instances inconspicuous. 



(2). A species at 1000-1500 ft. elevation on the island of 

 Lanai of which a series of both sexes were taken by the writer 

 in 1907-8, follows the description of 0. monas P. of Molokai 

 with some of the following exceptions, viz. : 



The wings are shining fuscous with a bronze appearance and 

 not with blue iridescence. The head and thorax are very finely 

 and sparsely punctured and the propodeuni is practically im- 

 I)unctate and smooth. The coloration of the abdominal segments 

 of the species presents a further difference from that described. 

 There are no specimens in Honolulu of 0. monas available for 

 comparison, the species having been taken on Molokai and de- 

 scribed l)y Dr. Perkins from one or two $ $ only.* 



*Since writing these notes I have secured a male example of 

 0. monas from Molokai and the specimen follows Dr. Perkins descrip- 

 tion of that species. In this single example there are further differ- 

 ences between it and the species from Lanai which it would be unwise 

 to refer to until a series have been captured. 



Under the circumstances I would hesitate to determine this 

 Lanai wasp either as 0. monas or as a variety of that species. 



(3). Another wasp which may be allied to 0. monas of 

 Molokai is a species of which the writer captured a series of 

 both sexes in 1910-11 on the scoriae in the district of Kau, 

 Island of Hawaii, at an elevation of approximately 300 feet. 

 ^Notwithstanding the different structure of the second ventral 

 segment of the abdomen and of the propodeuni as well as a 

 difference in the system of puncturation of the thorax and ab- 

 domen from that published in the description of 0. monas, I 

 hesitate for the present and for similar reasons to those explained 

 in the reference to the Lanai examples, to determine this Hawaii 

 Odynerus as a good species. There is still a possibility that 

 both this and the Lanai examples are representatives of the 

 0. monas of jMolokai. Should a series of the latter be secured 

 later on, as is very possible, it may be found that either one or 

 the other of the Hawaii and Lanai examples are intermediate or 

 that they may be determined as varieties only. 



(4). On Kauai at an elevation of 3000 feet both sexes of a 

 species were taken by Mr. A. Jordan in 1909 which closely 

 resembles 0. xeropliilus P. of Oahu and is possibly the Kauai 

 variety of that species. The variation is principally in the 



