BLACKBURN AND SHARP—On Hawaiian Coleoptera. 217 
57. 'Tachys mucescens, Blackb. 1. ¢. 
Ins. Oahu. (?) Int. 
Unique ; in decaying vegetable matter on the plains of Honolulu. 
Genus XI.—Bembidium. Mun. Cat. 1. p. 405 (sub nom. Bembicidium). 
58. Bembidium teres, Blackb. op. cit. xvii. p. 229. 
Inns. Maui. (?) Imm. 
Among decaying leaves, at an elevation of about 4000 feet, on Haleakala, in May. Rare. 
59. Bembidium pacificum, Blackb. op. cit. xv. p. 157. 
Ins. Oahu. (?)Imm. 
Not rare, but very local, though found in seyeral localities; it generally occurs running on damp 
ground. 
60. Bembidium ignicola, Blackb. op. cit. xvi. p. 109. 
Ins. Hawaii. (?) Imm. 
Unique ; found in a hot steam crack, beside the crater Kilauea on Mauna Loa, at an elevation of 
about 4000 feet, in February. 
61. Bembidium spurcum, Blackb. op. cit. xvii. p. 228. 
Ins. Maui. (?) Imm. 
Unique; the specimen was found in decaying leaves, at an elevation of about 4000 feet, on 
Haleakala, in May. 
Fam. DYTISCID 4. 
Tribe CoLyMBETINI. 
Genus XII.—Rhantus, Mun, Cat. ou. p. 448. 
62. Colymbetes pacificus, Boisd. Voy. Astr. Ent. m. p. 50. 
Ins. Hawaii, Maui, Lanai, Oahu, Kaui. (?) Imm. 
This insect occurs not rarely on all the islands visited, generally at an elevation of 1000 to 4000 
feet. 
Genus XIII.—Copelatus, Shp. Trans. Roy. Dub. Soc. Vol. m. 1882, p. 562. 
63. Colymbetes parvulus, Boisd. 1. ¢. 
Ins. Oahu, Maui. (?) Imm. 
Not rare; probably occurs on the other islands; generally found in company with Colymbetes 
pacificus. 
64. Copelatus mauiensis, Blackb., ante, p. 120. 
Ins. Maui. (?) Imm. 
Unique ; taken by sifting damp leaves round a small pool of water at an elevation of about 5000 feet, 
on Haleakala. May. 
2 G2 
