ABT. i!5. NEW SPECIES OF THE GENUS DOLICHOPUS ALDRICH. 17 



HYDROPHORUS BREVISETA Thonnon. 



Medeterus breiHseta Thomson, Fregat. Eugenies Resa, 1868, p. 150. 

 Hyclrophorus 'brcinseta Aldrich, Psyche, vol. 18, p. 58, tigs.. 1911. 



Four specimens, Seward and Skagway, Alaska. Described from 

 California, presumably San Francisco; since reported from the Puget 

 Sound region. 



HYDROPHORUS INNOTATUS Loew. 



Hydrophorus innotutus Lokw, Smiths. Misc. Colls., No. 171, p. 212, 1864. — 



Aldbich, Psyche, vol. 18, p. 66, 1911.— Malioch, Rept. Caiuid. Arctic 



Exped., vol. 3, p. 50c, 1920. 



Eight specimens, Skagway, Alaska, June 4, and Seward, Alaska, 



July 24. Originally described from Sitka, and since reported from 



Arctic Canada, Oregon, and Washington 



HYDROPHORUS GRATIOSUS Aldrich. 



Hydrophorus yratiosas Ar.uiucii, Psyche, vol. 18, p. 40; Entom. News, vol. 

 24, pp. 215, 217, 219. 

 Two specimens, Anchorage, Alaska, July 21, and Seward, Alaska, 

 July 24. Described from Idaho, Washington, and California, and 

 since reported from Utah and Nevada. 



HYDROPHORUS SIGNIFERUS Coquillett. 



Hydrophorus siynifenia C'oquillktt, Fur Seals and Fur Seal Islands, vol. 4, 

 p. 344, 1899.— Malloch, Rept. Canad. Arctic Exped.. vol. 8, p. 50c. 

 One female, Healy, Alaska, June 26. Described from Bering 

 Island, and reported with additional description by Malloch from 

 Teller. Alaska. The National Museum has eiglit specimens collected 

 by J. M. Jessup in 1912 on the x\laska-yukon boundary at latitude 

 69^ 20'. 



HYDROPHORUS AQUATILIS, new species. 



Female. — Front with gray pollen, along the orbits thinner so as 

 to show a little of the green color beneath ; face entirely gray poUi- 

 nose: cheek below the eye rounded and narrow; beard yellowish; 

 antennae black, of ordinary size; occiput with a single pair of 

 bristles. Mesonotum yellowish gray pollinose, with brownish re- 

 flections which are brighter above the wings; pleurae of the same 

 color : propleura with yellow hairs and one yellow bristle ; calypters 

 with yellowish cilia. Halteres decidedly black, the stem yellow ex- 

 cept at base. Abdomen greenish, coppery, with a thin gray pollen. 

 Legs black, the femora with greenish reflections ; front coxae covered 

 with yellowish pollen, with rather long yellow hair in front and 

 without any black bristles even at the tip. Front femora moderately 

 thickened at base, with a row of seven or eight spines hardly reach- 

 intr the middle, and some scattered much shorter spines extending 



