Carpenter et al.: Mosquitoes of Southern U. S. 121 



Mansonia (Mansonia) indubitans Dyar and Shannon 



Mansonia iinhihilans Dyar and Shannon, 1925, Jour. Wash. Acad. Sci., 15:41. 



ADULT FEMALE. — Medium sized to rather small species. Head: Proboscis 

 dark, speckled with pale scales and with a narrow white ring near apical third; 

 palpi a litde less than one-third as long as proboscis (segment 4 one and one- 

 half times as long as segment 3), dark scaled, speckled with white, and with 

 small terminal segment white. Occiput clothed with pale lanceolate scales and 

 numerous black erect forked scales. Thorax: Scutum covered by dark-brown 

 lanceolate scales intermingled with light golden-brown lanceolate scales (the 

 paler scales more numerous anteriorly and on prescutellar space). Postspiracu- 

 lar bristles present. Abdomen: First tergite pale scaled; remaining tergites 

 predominately dark scaled, with a few scattered whitish scales laterally and 

 apically; sternites with intermixed white and brown scales, the white scales 

 more numerous apically. Eighth segment blunt, largely retracted within the 

 seventh; eighth tergite (Fig. 61D) with numerous short stout spines more or 

 less regularly spaced and arranged in a curved posterior row and a somewhat 

 irregular anterior row. Apical margin of seventh tergite without a close-set 

 row of small spines. Legs: Femora and tibiae of fore, middle, and hind legs 

 dark-brown scaled, speckled with pale scales; mner surfaces of femora II and 

 III predominantly pale scaled. Tarsal segments 1 to 4 of fore and middle legs 

 each with a narrow basal white band; all segments of hind tarsus with white 

 basal bands. Witig: Scales mixed brown and white, very broad, intermingled 

 with a few narrower scales, particularly on veins 3, 4, and 5. 



ADULT MALE. — Coloration similar to that of female. TERMINAlia (Fig. 

 61). Ninth tergite (IX-T) unsclerotized, with lobes indistinct. Tenth sternite 

 (X-S) prominent, heavily sclerotized beyond middle; dorsal arm long, curved 

 dorsally, weakly sclerotized. Phallosome (Ph) large, lightly sclerotized, open 

 ventrally, closed dorsally near apex, expanded laterally and apically, broadly 

 rounded at apex. Claspette absent. Basistyle (Bs) about three times as long as 

 broad, narrower at middle than across apical fourth due to concavity of inner 

 margin, rounded at apex; outstanding vestiture consisting of a group of strong 

 setae at apex and several very long strong setae near base. Basal lobe (B-L) 

 very long and slender, extending a little beyond apical third of basistyle; basal 

 two-thirds of lobe narrow, stem-like, fused to basistyle; apical third swollen, 

 free, bearing a short stout bluntly pointed terminal rod. Apical lobe absent. 

 Dististyle (Ds) about two-fifths as long as basistyle, with basal third very 

 broad and thick, giving off a slender, inner branch; remainder of dististyle 

 becoming a little narrower and abruptly much thinner beyond origin of inner 

 branch, curved, slightly convoluted, tapered to a narrow tip. Terminal claw 

 (Ds-C) short, stout. 



LARVA. (Fig. 62). — Head much broader than long. Antenna about twice 

 as long as head, whip-like, sparsely spined basally; antennal tuft multiple, 

 barbed, arising from a notch on basal third; a pair of long stout setae inserted 

 at middle of shaft and extending to tip of antenna; apex of antenna bearing a 

 short spine, seta, and membranous papilla. Head hairs: Preantennal (A) mul- 



