1914] 
Smith—The Development of Anopheles punctipennis Say L7. 
DIFFERENTIAL CHARACTERS APPEARING DURING DEVELOPMENT. 
Egg 
Larva 
Ist 
Stage 
2d 
Stage 
3d 
Stage 
4th 
Stage 
Pupa 
Or 
Characteristics. 
Growth (average). Change. Period. 
.57 mm. Qd-3d day | 2-3 days 
(hatching) 
.5 mm. 4th day 3-4 days | 
(molt) 
2.2mm. 8th day 4--5 days | 
(molt) 
5 mm. 14th day 6-7 days 
(molt) 
.5 mm, 22d day 8-9 days 
(to pupa) 
24th day 2-3 days 
(to adult) 
Trregular spots; 
clasping membrane on 
sides only. 
Metathorax free at 
first: 6 simple hairs on 
head; 2 simple hairs 
inside brushes; rudder 
hairs absent; eyes sin- 
gle. 
6 branched hairs on 
‘top of head; 2 branched 
hairs inside brushes; 
rudder hairs present; 
‘eyes single. 
Head smaller than 
thorax; head dark with 
pigment; eyes double; 
‘respiratory siphons 
forming. 
Falmate hairs on 
abdomen; transparent 
areas on abdomen; 
notched processes on 
thorax; dorsal tuft on 
abdomen. (Late in 
forming.) 
