668 MOSQUITOES OF NORTH AMERICA 



Oulex twniorhynchus Johannsen, Bull. 68. N.Y. State Mus^ 416, 1903. 



Culex tceniorhynchus Smith, Kept. Ent. Dept., N. J. Exp. Sta., 1902, 529, 1903 



Gulex tcBtiiorhynchus Parker, Beyer & Pothler, Bull. 13, Yellow Fever Inst., Publ. 



Health & Mar. Hosp. Serv., 38, 1903. 

 Culex twniorhynchus Smith, N. J. Agr. Exp. Stat., Bull. 171, 21, 1904. 

 Oulex tcBniorhynchus Felt, Bull. 79, N. Y. State Mus., 301, 1904. 

 Culicelsa tcBniorhynchus Felt, Bull. 79, N. Y. State Mus., 3916, 1904. 

 Culex twniorhynchus Lutz in Bourroul, Mosq. do Brasil, 73, 1904. 

 Gulex twniorhynchus Ludlow, Can. Ent., xxxvi, 236, 301, 1904. 

 Culicelsa twniorhynchus Dyar, Proc. Ent. Soc. Wash., vii, 48, 1905. 

 Culex twniorhynchus Smith, N. J. Agr. Exp. Stat., Rept. Mosq., 216, 1905. 

 Culicelsa twniorhynchus Felt, Bull. 97, N. Y. State Mus., 473, 1905. 

 Oulex twniorhynchus Blanchard (in part), Les Moustlques, 291, 1905. 

 Theohaldinella twniorhynchus Blanchard, Les Moustlques, 393, 1905. 

 Oulex twniorhynchus Britton & Viereck, Rept. Conn. Agr. Exp. Stat, 1904, 270, 272, 



274, 1905. 

 Aedes damnosus Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 198, 1906. 

 Culex twniorhynchus Mitchell, Psyche, xiii, 11, 1906. 

 Ochlerotatus twniorhynchus Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 19, 



1906. 

 Ochlerotatus damnosus Dyar, U. S. Dept. Agr., Bur. Ent., Circular 72, 5, 1906. 

 Aedes damnosus Dyar, Proc. U. S. Nat. Mus., xxxii, 127, 1907. 

 Culicelsa twniorhynchus Theobald, Mon. Culic, iv, 377, 1907. 

 Oulex twniorhynchus Howard, Osier's Modern Medicine, i, 376, 1907. 

 Oulex twniorhynchus Aiken, Brit. Guiana Med. Annual, 1906, 67, 69, 1907. 

 Aedes twniorhynchus Busck, Smiths. Misc. Colls., quart, iss., lii, 63, 1908. 

 Culicelsa twniorhynchus Peryassli, Os Culic. do Brazil, 46, 185, 1908. 

 Culicelsa twniorhynchus Theobald (in part), Mon. Culic, v, 316, 1910. 

 Oulex damnosus Theobald, Mon. Culic, v, 395, 1910. 

 Aedes twniorhynchus Morse, Ann. Rept. N. J. State Mus., 1909, 717, 1910. 



Obioinai, Description or Cttlex twniorhynchus : 



FuscuB, fascia media proboscidis articulorumque tarsorum basi albis. Longit. 

 lin. 2%. fem. Mexico. 



Proboscis fusco-nlgra, fascia lata alba. Antennae nigro-fuscae; palpi nigro-fusci 

 apice albl. Thorax nigro-fuscus, pleuris paulo dilutoribus. Abdomen nigro-fuscum, 

 incisuris albicantibus. Alae limpidae fusco-squamulosae. Femora flavicantia; tibiae 

 et tarsi nigro-fusca; horum singull articuli basi albi. Mus. de Winthem et nostrum. 



Obioinai, Description of Ctjlex damnosus : 



Rostrum and tarsi annulate with white. 



Inhabits Pennsylvania. 



Head above with rather long yellow-ferruginous hair; antennae pale-brownish; 

 rostrum blackish, with a broad white band on the middle ; thorax black, with three 

 cinereous lines, and clothed with yellow-ferruginous short hair; scutel dull testa- 

 ceous; pleura grayish; feet pale, covered with blackish hair; joints of the tarsi, ex- 

 cepting the first, whitish at their bases; tergum brown, basal margins of the seg- 

 ments cinereous-whitish. 



Length a quarter of an inch. 



This is one of the most common and troublesome of our mosquettoes. It seems to 

 correspond in some degree with the cingulatus Fabr., although we must infer from 

 his description, that the posterior tarsi only are annulated. Wiedemann considers 

 the cingulatus as the male of his molestus, of which all the tarsi are annulated, 

 like those of our species. I feel however perfect confidence in the description of 

 Wiedemann, and therefore must consider our species distinct, inasmuch as the 

 thorax is not " lateribusque nivels ; " and from the laudable accuracy of that author, 

 I cannot suppose that he would have overlooked the annulatlon of the proboscis, 

 which certainly exists in this species. 



DESCRiPnoN OF Female, Maie, Larva, and Egg op AEdes Ta:NiORHTNCHUs : 



Female. — Proboscis rather long, moderately slender, cylindrical, the labellae 

 conically tapered; vestiture black with a white ring at middle; setae minute, 

 black, those on labellse more prominently outstanding. Palpi short, rather 

 stout, about one-fifth the length of the proboscis, black scaled, the tips white; 

 setse moderate, black. Antennae with the distal joints longer than the basal ones, 

 rugose, black, pilose; tori subspherical, with a cup-shaped apical excavation, 

 brown, a patch of silvery scales on inner side ; hairs of whorls moderate, sparse. 



