442 
kins, who says that it is probably a distinct species. With this I 
fully agree, as there are good structural characters to separate 
it in both sexes. Dr. Perkins’ unique specimen was collected at 
Kilauea, Hawai, in July, 1906. Two females were collected on 
Mt. Olympus, Oahu, by Swezey, on April 2, 1911, and in July, 
1918, I obtained a large series, including males from a larva of 
Odynerus nigripennis collected at Nuuanu Pali, Oahu. 
108. Tetrastichine near Melittobia. 
This is the parasite of Ereunetis flavistriata Wlsm. recorded 
by Mir, Swezey m 1909 from Honolulu (Exp: Sta Hes) Ee, 
Ent. Bull., 6, p. 29). It resembles Melittobia in many ways, but 
is smaller, more metallic, and the funicle has only two joints. 
The male, moreover, closely resembles the female. Reared by 
Mr. Swezey from an Ereunetis larva on coconut at Grove Farm, 
Kauai, September 13, 1907, and taken by him in Honolulu, Janu- 
ary 20, 1908. It seems to be a common parasite of Ereunetis 
in Honolulu, and probably is more widely distributed than the 
records show. 
109. *Ootetrastichus beatus Perkins. 
Introduced from Fiji in 1905 and now well distributed 
throughout the sugar-cane districts of the Islands. 
110. *Ootetrastichus formosanus Timberlake. 
Introduced from Formosa in 1916 and now distributed to the 
same extent as O. beatus. 
111. Tetrastichus hagenowii (Ratzeburg). 
Recorded by Ashmead in 1901 from Hawaii and Lanai, and 
probably one of the earliest immigrants of this group of insects, 
but not taken by Blackburn so far as I am aware. It presum- 
ably occurs on all the larger Islands, although | have seen speci- 
mens only from Kauai, Oahu, Mau, and Hawai. 
112. *Tetrastichus giffardianus Silvestri. 
Introduced by Fullaway from West Africa in 1914. The fol- 
lowing records of specimens taken in general collecting will be of 
interest: Collected on Konahuanui, Kaumuohona, and at Pauoa 

* Purposely introduced insects are starred throughout the list. 
