16 Psyche [February 
Taste Il. Duration or tHE Lite Cycie In Nasonia brevicornis, 









1908. 
te. 
L Ovipositi E | ac 
Koh cetoed. |) Orapoattion. | mengeneeyo® |i |e ahe eeeae 
| Ets 
| AS 
A, 
a 
1 | Musca | Sept.9-10 Sept.26 Oss. i 169 )'35:9° 574.09 
10 Q’s | (Sept. 10-25). 
2 Sept.10, 11 a.m. Sept.28 res 18 35.5 | 634572 
|2Q’ | (Sept. 10-27). 
3 Sept.10, 1 p.m. | Sept.25, 10 a.m | 9 @’s, | 14% | 36.2° | 538.3° 
12 Q’s | (Sept. 10-25). 
4 Sept.10, 10 p.m. Sept.25, 10 a.m./ 10, 14% | 35.5° 514.9° 
| 6 Q’s | (Sept. 11-25). 
| Sept.11 | Sept.28 26's, |217 | 34:38° | 578262 
17 Q’s | (Sept. 12-28). 
6 | Phormia| Sept.14, 7 a.m. | Oct.1,7 a.m. | 20"s, | 17 31.4° | 533.9° 
8 Q’s | (Sept. 14-30). 
7 Sept.18, 6 p.m. | Oct.2,9 p.m. |7<"s, | 14% | 28.3°| 408.1° 
12 Q’s | (Sept. 18—Oct.2). 
8 Sept.29 Oct.15 170’s| 16 | 19.6° | 314.3° 
\(Sept. 30-—Oct. 15). 
AV: 14 15.9 | 32.6° | fA 


mencing on May 14 at the average time of 4 P. M. Emergence of 
the adults occurred at 4 P. M., May 22, becoming general at 3 P. M., 
May 24. Hence, taking average time, the life cycle in this case had an 
average duration of 224 days, natural temperatures. 
G. Progeny of a Single Female. The number of observations 
which we were able to make concerning the fecundity of the species 
was not large, but those which are tabulated in the attached table 
(table III) appear to show that there is quite a wide range, within 
certain limits, which is more or less dependent upon the number of 
host puparia available for purposes of oviposition and also the host 
species. For instance, it is at once noticed that the most productive 
females had access to a comparatively large number of the host 

1Inception of development taken as 43° Fahr, Sums of daily averages. 
2 Daily averages. 

