AEDES ruscus 729 



Aedes idahoensis is closely allied to Aedes spenceru, but is, we think, distinct. 

 On the abdomen the median dorsal stripe is either absent or ill-defined and the 

 lateral margins are not continuonsly pale sealed, as in that species. It occupies a 

 different geographical area ; spencerii extends throughout the Canadian prairies, 

 while idahoensis replaces it to the south. It is probable that the record of 

 spencerii from California refers rather to this species, but we have not seen the 

 specimens. Professor Aldrich's remarks about the habits, quoted by Theobald, 

 refer to Aedes aldrichi and not to this species. The habits of idahoensis are 

 unknown, although they are probably essentially similar to those of spencerii. 



AEDES FUSCUS Osten Sacken. ^ . . > , . ' ' ^ 



Aedes fuscus Osten Sacken, Bull. U. S. Geol. Surv., Ill, 191, 1877. 



Aedes fuscus Giles, Gnats or Mosq., 348, 1900. 



Aedes fuscus Theobald, Mon. Culic, 11, 226, 1901. 



Aedes fuscus Giles, Gnats or Mosq., 2 ed., 481, 1902. 



Aedes fuscus Dyar, Journ. N. Y. Ent. Soc, x, 197, 1902. 



Aedes fuscus Johannsen, Bull. 68, N. Y. State Mus., 425, 1903. 



Aedes fuscus Dyar, Proc. Ent. Soc. Wash., v, 145, pi. 11, f. 11, 1903. 



Aedes fuscus Theobald, Mon. CuUc, Hi, 286, 1903. 



Aedes fuscus Dyar, Proc. Ent. Soc. Wash., vl, 41, 1904. 



Aedes fuscus Felt, Bull. 79, N. Y. State Mus., 339, 391e, 1904. 



Aedes fuscus Smith, N. J. Agr. Exp. Stat., Rept. Mosq., 332, 1905. 



Aedes fuscus Blanchard, Les Moustiques, 402, 1905. 



Aedes fuscus Theobald, Gen. Ins., Dipt., 26 fasc, 35, 1905. 



Culex palUdohirta Grossbeck, Can. Ent., xxxvll, 359, 1905. 



Aedes fuscus Felt, Bull. 97, N. Y. State Mus., 447, 492, 1905. 



Aedes fuscus Brltton & Vlereck, Rept. Conn. Agr. Exp. Stat., 1904, 271, 1905. 



Aedes fuscus Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 194, 1906. 



Aedes fuscus Coquillett, XJ. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 18, 1906. 



Aedes fuscus Dyar, U. S. Dept. Agr., Bur. Ent., Circular 72, 4, 1906. 



Aedes fuscus Theobald, Mon. Culic, iv, 538, 1907. 



Aedes fuscus Knab, Smiths. Misc. Colls., quart, iss., 1, 546, 1908. 



Aedes fuscus Thibault, Proc Ent. Soc. Wash., xii, 16, 1910. 



Aedes fuscus Dyar & Knab, Proc. Ent. Soc. Wash., xii, 81, 1910. 



Aedes fuscus and Aedes pallidoMrta Morse, Ann. Rept. N. J. State Mus., 1909, 720, 



1910. 

 Aedes fuscus Theobald, Mon. Culic, v, 484, 1910. 

 Culex palUdocephala Theobald, Mon. Culic, v, 612, 1910. 

 Culex pallidoMrta Theobald, Mon. Culic, v, 612, 1910. 



Original Desceiption of Aedes fuscus : 



^2- — Brown; thorax clothed with a short, appressed, brownish-golden tomentum; 

 abdomen with whitish-yellow narrow bands at the base of the segments; venter 

 whitish-yellow. Antennae black; proboscis and legs brownish, with a metallic re- 

 flection; femora paler on the under side; pleurae under the root of the wings with a 

 spot clothed with whitish scales. Long. corp. 3-4 mm. 



Ho6.^-Cambridge, Mass., in May. 



06s. — I bred this species from larvse which I found in a pool together with those 

 of several species of Culex. The larvs and pupae behaved exactly like those of 

 Culex, and only attracted my attention by their smaller size. If I could have known 

 beforehand that they belonged to Aedes, I would have compared them more closely 

 with the larvae of Culex. The metamorphosis of Aedes has never been observed 

 before. 



Oeiginal Desceiption of Culex paujdohibta: 



J. — Head brown, occiput clothed with yellowish scales and a few dark brown ones 

 Intermixed; antennae brown, the basal joint and basal half of following one dirty 

 yellow; proboscis brown, with whitish scales scattered over the surface save at the 

 apical fourth; palpi brown, tipped with silvery white, four jointed, apical joint 

 minute, flattened, spiny. Mesonotum covered with pale brown scales and with a 

 narrow median furrow obsolete on posterior portion, bounded on each side by scales 

 of a slightly darker colour; a lateral line of pale yellow scales beginning near the 

 posterior margin and extending to the middle of the lateral margin of the meso- 

 notum also encloses these darker scales; scutellum pale brown with creamy-yellow 

 bristles on the posterior margin; metanotum evenly pale brown; pleura yellowish- 

 brovm with patches of whitish scales; halteres dirty white. Abdomen creamy with a 

 metallic silvery-gray lustre in life, somewhat darker with grayish shadings in 



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