88 
[ September, 
24. Crabro stygius , sp. n. 
(No. 10). — Occurs in Oahu. I cannot consider this identified 
with No. 29; the clear wings separate it at once. The single ? I 
possess has a yellow collar, wanting in same sex of 29, which has the 
labrum covered with dense silvery pubescence (T. B.). 
S . Length, 4 lines. Resembles C. unicolor. Black ; abdomen shining ; face 
deeply channelled, eyes much wider apart than in unicolor ; labrum silvery ; top of 
head more shining than the thorax, but less so than the abdomen ; stemmata in a 
triangle on the vertex. Thorax finely punctured ; mesothorax with no distinct 
longitudinal depression, which exists in 0. unicolor, but with a transverse ridge 
before, and two behind, and the metathorax slightly channelled, as in that species. 
Wings hyaline, but slightly clouded. Abdomen smooth and shining, clothed to- 
wards the apex with greyish pubescence (W. F. K.). 
25. Pison iridipennis, Smith. 
(No. 40). 
2G. Pison hospes, Smith. 
(Nos. 38 & 39). — In writing to Mr. Smith, I did not intend to 
imply that Pison is parasitic, but merely remarked on the circumstance 
that species of three genera combined in the construction of a single 
mass of cells (T. B.). 
27. Polistes aurifer , Sauss. 
(Nos. 26 & 27). — Plentiful all over the islands, and stings very 
severely. Makes nests in various places, usually preferring (as far as 
my experience goes) a hollow trunk of a tree (T. B.). A well-known 
Californian species (W. P. K.). 
28. Camponotus sexguttatus , Mayr. 
(Nos. 18, 42, 43). — Common in Honolulu; $ common at light 
in Oahu (T. B.). 
29. Prenolepis clandestine r, Mayr. 
(Nos. 19 & 20). — I have found a small nest under a stone near 
Honolulu, from which I obtained the male, worker, and a single 
female (T. B.). 
30. P oner a contracta, Latr. 
(Nos. 50 & 51). 
31. Lcptogenys insularis , Smith. 
(No. 52). — Honolulu, and the surrounding plains (T. B.). 
32. Teiramorium guinccnse, Pabr. 
(No. 49). 
