512 MOSQUITOES OF NORTH AMERICA 



Scutellum trilobate, dark brown, clothed with narrow, curved pale-golden 

 scales, each lobe with a group of dark bristles. Postnotum elliptical, prominent, 

 blackish, nude. Pleune and coxse brown, pleura with two blackish transverse 

 lines, clothed with patches of elliptical white scales and rows of brown bristles. 



Abdomen subcylindrical, slightly tapering posteriorly, the last segment 

 subtruncate; dorsal vestiture blue black, with long golden bristles at ends of 

 segments, a row of large lateral, segmental, sub-basal white patches ; first seg- 

 ment with many pale-golden hairs on the disk; ventral vestiture black, with 

 dull white, broad basal bands, except on the last segment. 



Wings rather broad, hyaline ; petiole of second marginal cell about one-third 

 as long as its cell, that of second posterior cell shorter than its cell ; basal cross- 

 vein distant about its otvti length from anterior cross-vein; vein scales black, 

 dense, broadly lanceolate or elliptical, many of them obliquely subtruncate, 

 nearly covering the wing surface on distal and costal portion. Halteres pale, 

 with darker knobs. 



Legs moderate, the vestiture blue black, ringed u'ith yellowish white ; femora 

 yellowish beneath on basal portion, with a white subapical ring, tip narrowly 

 white; hind femora with a white spot on outer side of basal third; front and 

 middle tibise with a large white spot at outer third and with a white line on 

 under side, hind pair with a broad white ring, tips broadly white; tarsi with 

 narrow white rings on each joint involving both ends of joints. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 3_mm. 



Life history and habits unknown. 



Panama, 



Panama City, April 18, 1904 (J. W. Eoss) ; Ancon, Canal Zone (A. H. Jen- 

 nings) ; Culebra, Canal Zone (A. H. Jennings). 



The wing-scales of Mansonia nigricans may be said to be intermediate in 

 character between those indicated by Theobald for his genus Panoplites and 

 those by which he defined the genus Tceniorliynclius. 



MANSONIA FASCIOLATUS (Lynch Arribalzaga) Dyar & Knab. 



Tceniorhynchus fasciolatus Lynch Arribalzaga, Rev. Mus. de La Plata, ii, 150, 1891. 



Culex fasciolatus Giles, Gnats or Mosq., 234, 1900. 



Twniorhynchus fasciolatus Theobald, Mon. Culic, ii, 192, 1901. 



Tceniorhynchus fasciolatus Giles, Gnats or Mosq., 2 ed., 363, 1902. 



Twniorhynchus fasciolatus Goeldi, Os Mosq. no Para, 23, 27, 1902. 



Twniorhynchus fasciolatus Neveu-Lemaire, Archiv de Parasit., vi, 616, 1902. 



Tceniorhynchus fasciolatus Theobald, Mon. Culic, iii, 269, 1903. 



Twniorhynchus fasciolatus Parker, Beyer & Pothier (in part), Yell. Fever Inst, Bull. 



13, 37, 1903. 

 Twniorhynchus fasciolatus Lutz in Bourroul, Mosq. do Brasil, 38, 70, 1904. 

 Twniorhynchus fasciolatus Giles, Journ. Trop. Med., vii, 382, 1904. 

 Twniorhynchus fasciolatus Blanchard, Les Moust., 383, 1905. 

 Twniorhynchus fasciolatus Goeldi, Os Mosq. no Para, 106, 1905. 

 Twniorhynchus fasciolatus Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 24, 



1906. 

 Twniorhynchus fasciolatus Aiken, Brit. Guian. Med. Ann., 1906, 68, 1907. 

 Twniorhynchus fasciolatus Theobald, Mon. Culic, iv, 483, 1907. 

 Twniorhynchus fasciolatus Autran, Anal. Dep. Nac Hig., xiv, 26, 1907. 

 Twniorhynchus fasciolatus Peryassii, Os Culicid. do Brazil, 218, 1908. 

 Twniorhynchus fasciolatus Busck, Smiths. Misc. Colls., quart, iss., Iii, 63, 1908. 

 Mansonia fasciolatus Dyar & Knab, Ent. News, xxi, 264, 1910. 

 Twniorhynchus fasciolatus Theobald, Mon. Culic, v, 420, 1910. 



Rhynchotwnia fasciolata BrMhes, Anal. Mus. Nac. Buenos Aires, Ser. 3, xiii, 470, 1911. 

 Pseudotaeniorhynchus fasciolatus Theobald, Novae Culic, i, 19, 1911. 



