A STUDY OF COMPSILURA CONCINNATA. 
tend so far basally, but the mem- 
branous portion is larger than in 
the second stage. The spiny 
armature is even less than in the 
second stage, only a thin sprink- 
ling of spines being present on 
the anterior end of each segment. 
The anal stigmata are black and 
much larger than in the second 
stage, appearing as they will be 
found in the puparium (fig. 8). 
LIFE HISTORY. 
METHOD OF HANDLING. 
The collection and handling 
of host material in the laboratory 
has been referred to in the pre- 
ceding pages. The methods of 
handling the parasite in deter- 
mining its life history follow. 
In the fall of 1914, when the 
Poste- 
Fic. 
rior end of puparium, showing char- 
acteristic structure of the stigmata and 
8.—Compsilura concinnata: 
anal opening, Greatly enlarged, 
(Original.) 
13 
Anterior 
right lateral 
(Original. ) 
Fic. 7.—Compsilura concinnata: 
end of third-stage larva, 
view. Greatly enlarged. 
life-history work on Compsilura 
was begun, the notes at the labo- 
ratory were thoroughly reviewed 
and all of the information con- 
cerning this parasite assembled. 
All of the available literature was 
studied, and, while several authors 
had written of Compsilura, very 
little could be found concerning 
the actual life history of the para- 
site. At this time experiments 
were being carried on to investi- 
gate the life history of Apanteles 
lacteicolor Vier., and it was from 
the type of tray then in use that 
the present “reproduction tray” 
(fig. 9) for Compsilura was evolved. 
This tray measured 12 by 12 by 5 
inches, with a groove around three 
sides, in which a sliding glass 
cover could be fitted. The bottom 
of the tray was of muslin, which 
permitted of partial ventilation and 
could bereplaced. In two opposed 
