86 
I September, 
7. Men a chile diligens , Smith. 
(No. 23). 
8. Mylocopa ceneipennis , De Geer. 
(Nos. 21 & 22). — A common South American insect ( W . F. K.). 
Common near Honolulu, and I think elsewhere. Does much damage 
by boring holes in trees, timber, &c. (T. B.). 
9. Apis mellijica, Linne. 
(No. 65). — Island of Oahu (T. B.). 
10. Pelopceus Jlavipes, Fabr. 
(Nos. 16 & 37). — One of the commonest Hymenoptera all over the 
Archipelago. I bred it, as well as Pison hospes, and also a species of 
Odynerus , from a single mass of mud cells found adhering to the eaves 
of an old shed, on Kauai (T. B.). 
11. Odynerus local is, Smith. 
(Nos. 30 & 31). — Common on Kauai. Apparently same habits as 
O. maurus, and may possibly be a variety (T. B.). 
12. Odynerus extraneus , sp. n. 
(No. 32). — $. Length, 61 lines. Closely resembles the last species, with 
which it was confounded by Mr. Smith. Black ; head, thorax, and basal segment 
of abdomen closely and coarsely punctured ; but the remainder of the abdomen 
is black and shining, and very finely punctured. The basal segment is more con- 
stricted behind than in localis. The first and second segments are bordered behind 
with pale yellow as in localis (not with white, as Smith erroneously states in his 
description of that species), but the punctures on the second band, which are very 
distinct in localis, are scarcely visible in extraneus (W. F. K.). 
From Kauai ; I do not possess the $ (T. B.). 
13. Odynerus maurus, Smith. 
(Nos. 11 & 12). 
14. Odynerus rubritinctus, Smith. 
(No. 15).' — Taken in company with Prosopis PlacJcburni in Maui. 
I possess three specimens, all males. In O. PlacJcburni the wings 
are light fuscous, with a kind of fuscous iridescence, but with no trace 
of violet ; in rubritinctus they have a brilliant violet iridescence. The 
head, thorax and abdomen are coloured identically in all the specimens 
of PlacJcburni and rubritinctus respectively ; the punctuation of 
PlacJcburni is coarser and more confused than in the other species, 
especially on the first segment of the abdomen. The males of rubri- 
tinctus have two long styles projecting from the apex of the abdomen 
