(A) I lie while hind-looted group comprising: 
Ce. argyrotarsis, 
Ce. albimana, 
Ce. tarsimaculala. * 
(b, The leg uniformly coloured group comprising: 
A. pseudo punctipennis , 
A. franciscanus. 
(c) 1 he spotted leg group comprising : 
Arr. ( ?) malefactor , 
A. (?) apicimacula. 
1 hese groups present well-marked differences in the markings of 
adults, m the breeding habits and anatomical characters of the 
larvae, and, as will be shown, they possess varying susceptibilities 
to malaria. 
Hie following are descriptions of the species of Anophelines of 
the Canal Zone: — 
l et.ua argyrotarsis 
and withn X a .r ith r CSOnUt T hlnish -S^y> with three more or less longitudinal line 
spots The ahnT eS °! e !i^j mesonotum, and sometimes traces of two dark lateral 
with dark scaled dusk y-brown, with a few creamy scales. Legs covered 
of hind l e «s pure white larsi apicalIy white banded ; last three joints 
several smaller pale spots ^ ° f ^ 5 COSta dark with two dislinct and 
at the sideT* W f th wbite u P r »ght spatulate scales in front, black behind and 
biack • antennae i" l-° . VV , 1,te ha,rs Projecting forwards between the eyes. Eyes 
a fewpatches of' vht W V ] Pa * 6 si, ky Pubescence and brown hair; basal joint dark, 
black scales esn p 6 a Ca l ' S ° D t,le brst few basal joints; palpi covered with long 
nirrow wSe^ Tings o^n thTln' n T* ^ pure -hite/Jd there are also two 
joint has a nnmh ^ t pical ends of the joints; ventrally, the penultimate 
a ring - proboscis^ 0 ^ 6 ) ‘' Wl ^ h ' white scales, which sometimes seem to form almust 
rmg, proboscis clothed w.th short dark scales. 
lines, the 'niTdd"^ one'm SI e rt- S ^ en ’ With three more or ,ess distilict longitudinal 
scattered over the °' S dlst,Ilct » and of a purplish hue, with pale scales 
brown • pleurae darl-'" 1 "-!^ 1 ’ scutellum dark towards the middle; mesonotum deep 
dark ,a,e alTpi , ' 7 h ' h herC a " d ,h ™ ^ <»«»>«» (there a™ .races o<» 
•specimen). ^ mesonotuin > wb ich are clearly seen in the St. Lucia 
especially in th^middli. PUri - ,IS ^ « r ' ,Wn ’ cIothcd with creamy yellow scales, 
grey scales on the postedo^bord ^ SegmentS; the segments have lateral tufts of 
bright brown; viewed with ■, !■, proje f t,ng from th e sides; hairs long, deep 
colour; in other specimens dull ket ‘ le ” s the abdomen is almost black in ground 
___ specimens dull yellowish reflections may be seen. 
f *° ' Jheobald (Monograph of Culicidae, Vol. V, p. 69) identical 
