SPRING NUMBER 59 
the total number and the per cent of each species caught during 
the year. 
TABLE II 
og nn 
| vo eS) 
s/o 
Sl ee 
fees 2 ale 
Species Caught ie SIS = 53 r= | Pies 
| = 5 oe ote eo - Ss 
2 | el|ee/ee| ee] 2] as 
o | D | oo 7S » 
a: | tay es, i ee 
Culex quinquefasciatus Say.|11723|8363|41+ | 839 | 1022 |20086| 98.30+ 
Anopheles quadrima : 
CULTS ON eee 26| 171/86.8 11 18 197 Noa = 
Anopheles crucians Wied... at) 124)77-- 8 1 161 ks 
Psorophora ciliata Fab....... aie | 2 il 
Stegomyia calopus Meig.....| | | 3 (ince 
otal See 11786|8658)42.33| 858 | 1052 |20449/100.06 
It is seen from the table that Culex quinquefasciatus is the 
dominant species but the percentage given is probably higher 
than is usually found. The relative abundance of the different 
species varies from time to time, but Culex quinquefasciatus 
usually comprises from 80 to 85% of those seen. During 
December very few Culex quinquefasciatus were seen at the 
Experiment Station, while Anopheles were common. Anophe- 
les comprised from 15 to 20% and sometimes more of those 
collected by hand in the dormitories during October and 
November. No Anopheles were found resting on the window 
screens at 2300 West Hernando Street with the Culex until 
about December 1st. From December 1st until February 1st 
both species of Anopheles were found, but usually more 
Anopheles quadrimaculatus. Then Anopheles crucians became 
more abundant, comprising about 10% and sometimes more 
of all those seen. On March 29th, twenty-five Anopheles 
crucians and only two Culex were counted on the screen. Only 
an occasional individual was seen on the screens at 203 West 
Ninth Street, while they were always thick on the screens on 
the front porch at 2300 West Hernando Street, often as many 
as a hundred individuals being counted in the morning before 
they were disturbed. The wisteria vines shade the screens 
at the latter place while there is no such protection at the 
former. 
Stegomyia was occasionally seen in considerable numbers 
about the building, but only three were taken throughout the 
(Continued on page 67) 
