96 
MALARIA 
gether, less than, one-third the distance be¬ 
tween inner and outer clypeal hairs; inner 
submedian prothoracic hair palmate, with 
about 15 narrow lanceolate leaflets. strodei 
Inner anterior clypeal hairs not so close to¬ 
gether, about one-third the distance between 
inner and outer clypeal hairs; inner subme¬ 
dian prothoracic hair palmate, with about 10 
narrow lanceolate leaflets (rapid stream 
breeder, Costa Rica) . anomalophyllus 
Key to the Male Terminally of the Neotropical 
Species of the Anophelini Encountered 
North of South America 
1. Side-pieee without parabasal spine; a large 
spinose sub-basal lobe present (genus cha- 
GASIA) .BATH ANUS 
Side-pieee with parabasal spine or spines 
(genus anopheles) ..2 
2. Side-piece with two spines, one very large 
parabasal, one internal (subgenus Stetho- 
myia) . kompi 
Side-piece with three spines, two parabasal, 
one internal (subgenus Anopheles) .3 
Side-pieee with four spines, one parabasal, 
two accessory, one internal (subgenera 
Nyssorhynchus and Kerteszia) .12 
3. Mesosome without leaflets; outer lobe of 
claspette with three long filaments, the tips 
much broadened and bent inwards, pipe¬ 
shaped; inner lobe with two or more nar¬ 
row, flattened, pointed filaments, the outer¬ 
most the longest (Guatemalan highlands) . 
XELAJUENSIS 
Mesosome with leaflets; lobes of claspette not 
as above... 4 
4. Mesosome with leaflets all of the same general 
shape (series anopheles) .5 
Terminal leaflets of mesosome always longer 
and broader than others (group Arribal- 
zagia and series Cycloleppteron) .8 
5. Mesosome with a single pair of long, black, 
serrate leaflets; mesosome long, slender, nor¬ 
mal .EISENI 
Mesosome with more than a single pair of 
leaflets; these leaflets small, transparent, 
difficultly visible; mesosome short, curved..6 
6. Claspette lobes with two or three very long, 
inwardly curving setae at apex .7 
Claspette lobes with one or two fused bladelike 
filaments on outer lobe; inner lobe with a 
single long, pointed seta at apex, and a 
shorter slender seta on internal aspect at 
base; mesosome with one or two pairs of 
small, broad, shallowly serrate leaflets. 
PARAPUNCTIPENNIS 
7. Mesosome with two or three pairs of long, ser¬ 
rate leaflets; if three pairs, the middle pair 
the longest; outer lobe of claspette with 
three somewhat fused, bladelike, pointed fila¬ 
ments .. T .HECTORIS 
Mesosome with one to four pairs of small, deli¬ 
cate, deeply serrate leaflets; outer lobe of 
claspette with two or three somewhat fused, 
bladelike, rounded filaments .... 
PSEUDOPUNCTIPENNIS 
8. Mesosome with a single pair of very long, 
lanceolate leaflets, three-quarters the length 
of the mesosome . vestitipennis 
Mesosome with more than a single pair of 
leaflets . 9 
9. Mesosome with two pairs of leaflets, the ter¬ 
minal pair large, the smaller pair less than 
half the length of the larger (Antilles) . 
grabhamh 
Mesosome with more than two pairs of leaf- 
10. Terminal leaflets much larger than the other 
pairs, elongate diamond-shaped, with central 
rib and hyaline margins . punctimacula 
Terminal leaflets without hyaline margins.11 
11. Terminal leaflets about twice the length of the 
next smaller pair, saber-shaped; ventral 
claspette lobes very hairy. apicimacula 
Terminal leaflets very wide, the other pairs, 
usually four, all very slender and nearly as 
long as the terminal pair; claspette lobes 
scarcely hairy, with one stout apical hair and 
two smaller accessory hairs . 
NEOMACULIPALPU S 
12. Side-piece with internal spine between acces¬ 
sory spines and parabasal spine; mesosome 
slender, tapering, without terminal leaflets 
(subgenus Kerteszia ) .neivai 
Side-piece with internal spine between acces¬ 
sory spines and apex of side-pieee (subgenus 
Nyssorhynchus ) .13 
13. Mesosome with a pair of leaflets . 14 
Mesosome without leaflets .16 
14. Fused ventral lobes of claspette with long, 
hairy basal lobules, as in oswaldoi; meso¬ 
some with two long, straight, thick, tapering 
leaflets, coarsely serrate on outer terminal 
half .ANOMALOPHYLLUS 
Fused ventral lobes of claspette low, without 
long, hairy basal lobules .15 
15. Tip of mesosome long, scoop-shaped; a pair 
of leaflets from slight offsets on sides; leaf¬ 
lets long, straight, somewhat widened at 
middle, deeply serrate on terminal half; 
fused ventral lobes of claspette with rounded 
apex, with microtrichia, and two small, hair¬ 
less, wrinkled, pouchlike ventral projections 
basally . darlingi 
Tip of mesosome very short, rounded; the pair 
of leaflets not from offsets, short, curved, 
serrate; fused ventral lobes of claspette low, 
