MANSONIA NIGEICANS 511 



to other species. P. W. Edwards has examined the specimen from Toronto, 

 Canada, recorded by Theobald as Tceniorhynchus richardii, and found it to be 

 Mansonia perturhans. Giles, in the second edition of his book, redescribes 

 Walker's type but gives as the locality Honduras. We are unable to understand 

 this as Walker states that his specimen was from the United States and we have 

 never seen specimens from farther south. The record of this species from Vera 

 Cruz, Mexico (Parker, Beyer & Pothier, Yell. Pev. Inst., Bull. 13, 38, 1903) 

 is undoubtedly based on a misidentification. 



MANSONIA NIGRICANS (CoquUIett) Dyar & Knab. 

 Tceniorhynchus nigricans Coquillett, Proc. Ent. Soc. Wash., vi, 166, 1904. 

 Coguillettidia nigricans Dyar, Proc. Ent. Soc. Wash., vii, 47, 1905. 

 Tceniorhynchus nigricans Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 24, 



1906. 

 Aedes nigricans Busck, Smithsonian Misc. Colls., quart. Iss., lii, 64, 1908. 

 Mansonia nigricans Dyar & Knab, EJnt. News, xxi, 264, 1910. 



Original Desceiption of T^NioEHYNCHtrs niqeicans : 



Near perturhans, but smaller and darker, the first joint of the hind tarsi devoid 

 of a median light colored band, etc. Deep black, a median band on the proboscis and 

 the halteres yellow. Scales of palpi black, those at the apex white, appressed scales 

 of occiput yellow, the upright ones brown. Mesonotum nearly covered with golden 

 yellow scales, those of the abdomen black and with a lateral patch of whitish ones in 

 the front angles of segments two to seven, venter black scaled and with a broad 

 fascia of whitish ones on the base of each segment. Legs black scaled, femora with a 

 stripe of yellow ones toward the base of the posterior side, a few on the front side 

 toward the base, a ring of whitish scales at three-fourths the length of the femora, 

 scales at extreme apices of femora and bases of tibiae whitish, tibiee also with a 

 narrow streak of whitish ones extending nearly the entire length of the posterior 

 side, a broad band of whitish ones at two-thirds their length, those at the apex also 

 whitish, tarsi with a rather narrow band of whitish ones at the base of each joint, 

 tarsal claws not toothed. Wings hyaline, the scales brown the lateral scales of the 

 veins broadly lanceolate, second submarginal cell much longer than the second 

 posterior, about four times as long as its petiole. Length 3.5 mm. 



Panama. Two females collected by Dr. J. W. Ross. 



Type. — No. 7943, U. S. National Museum. 



Descbiption of Female of Mansonia nigeicans (Male and Laeva Unknown) : 



Female. — Proboscis moderate, subcylindrical, hardly widened at tip, labellse 

 conically tapered; vestiture black with a broad yellowish-white ring near 

 middle; setse minute, black, those on labellse more prominently outstanding. 

 Palpi short, one-fourth as long as the proboscis, black scaled with a white tip ; 

 setae moderate, black. Antennae with basal joints of shaft shorter than distal 

 ones, rugose, pilose, black; second joint fusiform, pale at base, bearing a few 

 black scales; tori subspherical, with a cup-shaped apical excavation, luteous 

 brown, with a patch of yellowish white scales on inner side; hairs of whorls 

 sparse, moderate, black. Clypeus rounded triangular, convex, blackish, prui- 

 nose, nude. Eyes black. Occiput brown, clothed with narrow, curved pale 

 golden scales on the vertex, broader ones on the sides and along eye-margins 

 shading to white; many erect forked scales on the nape, yellow on the vertex, 

 black posteriorly and at the sides, a dark spot at the sides, produced by the 

 absence of pale scales; setae along margins of eyes black, some coarse reddish 

 yellow ones projecting at vertex. 



Prothoracic lobes elliptical, remote dorsally, dark brown, clothed with golden 

 scales and black bristles. Mesonotum dark brown, blackish on the lateral de- 

 pressions, clothed dorsally with rather coarse and dense, narrow, curved golden 

 scales forming three broad longitudinal stripes separated by two narrow, bare 

 impressed lines, ante-scutellar space blackish, surrounded by golden scales ; short 

 lines of golden scales over roots of the wing and along extreme lateral margins; 

 some black scales on the blackish lateral areas ; bristles coarse, reddish brown. 



