291 

 On a New Genus of Hawaiian Chironomids.* 



BY F. W. TEURY. 



Only two species of this abinidant family have hitherto been 

 described from the Hawaiian Islands, namely, Chirouomus hn- 

 icaiiensis Grims, and Tanyiarsm ladeiclnrns Grims. ; two 

 other genera, Orthocladius and Ceratopogon being also reju-e- 

 sented, bnt none are described. The endemic genus under dis- 

 cussion is so far represented by two species, the larger occurring 

 on both islands of Hawaii and Maui, and the smaller on Kauai. 

 The latter island, owing doubtlessly to its greater age and isola- 

 tion, has produced a somewhat distinctive fauna from the rest 

 of the archipelago, and this characteristic again presents itself 

 in the peculiar sexual structures of the Kauaian species. 



The simple palpal and antennal characters of this endemic 

 genus suggest Clunionine affinities, as represented by Haliry- 

 tus and Eretmoptera. But the apparently still plastic condition 

 of the palpi has led me to attach less importance to this simi- 

 larity, and its proper location would appear to be in the Chiro- 

 nominae. The venation is extremely like that of Thalassomyia, 

 and the larval habits of the latter appear to be siuiilar ; the 

 peculiar spatulate and pectinate structure of the male claw in 

 the Kauaian species, has a parallel apparently in Scopelodromus, 

 but its real affinities are undoubtedly with Telmatog-etoii. Be- 

 sides agreeing with the latter in general larval and adult char- 

 acters, the remarkable obliquely-truncate formation of the pupal 

 abdomen, with its peculiar terminal plate, is practically identi- 

 cal with that of Telmatogeton as figured by Schiner.** I there- 

 fore propose to place it near Telmatogeton, erecting for it the 

 new genus Charadromyia. Should this position prove to be 

 correct, its presence on this isolated archipelago in the Xorth 



*This is part of the paper, "Biological Notes on Hawaiian Dip- 

 tera," presented by Mr. Terry as Presidential Address, Dec. 15, 1910. 

 The manuscript of the address was not available for publication at 

 the time of publication of the Proceedings for 1910, as Mr. Terry 

 had taken it away with him on a vacation trip to England. After his 

 demise, some manuscripts and notes were returned, among them 

 some portions of his address were found, but not in complete form 

 for publication. Mr. Muir has arranged this much of them for pub- 

 lication. It seemed desirable to do so, being descriptions of an 

 interesting new genus and two new species, with biologic notes. — [Ed.] 



-*Novara Reise Zool.. 1868. Bd. II, pi. II, ff, le. If. 



Proc. Haw. Ent. Soc, II, No. 5, July. 1913. 



