MANSONIA TITILLANS 517 



Mansonia tittilans Aiken, Brit. Guiana Med Ann., 1906, 68, 1907. 



Mansonia titillans Theobald (in part), Mon Culicld., Iv, 494, 1907. 



Mansonia titillans Autran, Anal Dep. Nac. Hig., xiv, 24, 1907. 



Mansonia titillans Dyar & Knab, Can. Ent., xl, 312, 1908. 



Mansonia titillans Peryassli, Os Culicid. do Brazil, 49, 231, 1908. 



Mansonia titillans Busck, Smiths. Misc. Colls., quart, iss.. Hi, 60, 1908. 



Mansonia titillans Pazoa, San. y Ben., ii, 48, 427, 1909. 



Mansonia titillans Moore, The Daily Argosy, Demerara, Jan. 27, 1910, and Feb. 3, 1910. 



Mansonia titillans Dyar & Knab, Ent. News, xxi, 259, 1910. 



Mansonia titillans Newstead & Thomas, Ann. Trop. Med. Par., iv, 144, 1910. 



Mansonia titillans Theobald, Mon. Culic, v, 448, 1910. 



Original Descbiption op Culex titillans: 



Fem. Fuscus, aMominis segmentis utrinque alio maculatis, antennarum articulis 

 albo cinctis, rostro flavo cincto, femoribus basi genubwsque pallidis, tarsis albo 

 cinctis, alis subfusois. 



Body dark brown: feelers black; each joint white at the base: mouth black, with 

 a dull yellow band across it: abdomen with a white spot on each side of the fore 

 border of every segment: legs brown; thighs paler towards the base; knees yellow; 

 feet with a white band at the base of each joint: wings slightly brown; veins brown; 

 poisers yellow, with brown knobs. Length of the body 2 lines; of the wings 4 lines. 



a. Brazil. Presented by Mrs. J. P. G. Smith. 



Descbiption 01" Female, Male, and Lakva of Mansonia titillans : 



Female. — Proboscis rather short, nearly uniform, labellae large ; vestiture of 

 black semi-erect scales with yellow ones intermixed on basal half, a narrow 

 white ring beyond the middle. Palpi about two-fifths the length of the pro- 

 boscis ; vestiture of black semi-erect scales with whitish ones intermixed, apices 

 silvery scaled. Antennae filiform, the segments rather short and stout, rugose, 

 blackish, with white basal rings; hairs of whorls sparse, rather short; tori small, 

 brown, with a few whitish scales. Clypeus large and prominent, broadly 

 rounded in front, brown, naked. Occiput with narrow, recumbent yellowish 

 and whitish scales and a dense mass of black, erect, forked scales covering entire 

 dorsal surface ; ocular margin and sides of head white scaled. 



Prothoracic lobes well separated, prominent, contiguous with the head, bear- 

 ing numerous black setse and light colored scales. Mesonotum rich chestnut 

 brown, sparsely clothed with minute, narrow, curved, deep brown and larger 

 golden scales intermixed; two submedian longitudinal, rather closely approxi- 

 mated bare stripes from anterior margin nearly to bare space; setae abundant 

 but rather short, deep brown. Scutellum covered with golden scales and with 

 three groups of long, coarse brown setse. Postnotum brown, with a faint median 

 ridge, nude. Pleurae and coxae brown, clothed with patches of small sordid 

 white scales. 



Abdomen subcylindrical, somewhat depressed, slightly expanded and truncate 

 at apex; vestiture above of dusky scales with numerous dull yellow ones inter- 

 mixed, particularly at sides and on last two segments ; laterally the hind margins 

 of the segments are white scaled ; first segment with the yellowish scales pre- 

 dominating and with numerous long yellowish cilia ; beneath the vestiture is of 

 dusky scales intermixed centrally with many whitish ones, at the sides with 

 yellow ones, the hind margins white scaled; eighth segment with a row of 

 closely set, small, stout hooks along dorsal posterior margin; lateral cilia and 

 those of hind margins of segments abundant, rather long, brown. 



Wings rather broad, slightly smoky ; second marginal cell very long, more than 

 twice as long as its petiole; base of second posterior cell in line with base of 

 second marginal cell ; basal cross-vein slightly more than its own length from 

 anterior cross- vein ; scales along the veins blackish, with numerous yellow ones 

 irregularly intermixed, in two series, the upper ones large, very broad, obliquely 



