A STUDY OF COMPSILURA CONCINNATA. 11 
which are found in the first-stage Compsilura maggot. (Figs. 1 
and 5.) 
Respiration takes place through the anal stigmata of the larva, air 
being furnished by the stigma or trachea of the host. A tracheal 
funnel is formed by the maggot pushing itself backward against the 
> 
ih i? 
Uys A AN) 
Cy 4 
nn a 
KY HY 
Peesbat tase, Me oe SG 
Delian, 2 eee 
Ay ao aS ips 
st “ea pee = bere eh 
ATT ee 
——~ 
tS 
Vic. 4.—Compsilura concinnata: Reproductive system of fully developed 
fertilized female. A, Ovary; B, oviduct; ©, anterior uterus; D, 
accessory glands; W, spermatheer; J, posterior uterus; G, piercer 5 
Hi, support for piercer; J, Larvipositor; J, anus; K, rectum, showing 
rectal papille. Greatly enlarged. (Original.) 
place of attachment. This leaves the anterior end of the parasite 
larva free for feeding. As the larva molts, it pushes the exuvium 
down on the funnel, and it is possible to locate both the first and 
second stage mouth-hooks upon dissection of the host. The larva 
remains in this funnel until just previous to emergence from the host, 
when it breaks loose and emerges ready for pupation. 
