424 Tachina Flies. 
the bees, One of the largest and most beautiful of these 
Fig. 213) is Anax junius. It has a wide range in the 
nited States, North and South, and everywhere preys 
uyon the bees. 
TACHINA FLY. 
From descriptions which I have received, I feel certain 
that there is a two-winged fly, probably of the genus 
Tachina (Fig. 214), that works on bees, I have never 
seen these, though I have repeatedly requested those who 
Fic. 214. 
have to send them to me. My friend, J. L.- Davis, put 
some sick looking bees into a cage, and hatched the flies 
which he told me looked not unlike a small house fly. It 
is the habit of these flies, which belong to the same family 
as our house flies, which they much resemble, to lay their 
eggs on other insects, Their young, upon hatching, bur- 
row into the insect that is being victimized, and grow by 
eating it. It would be difficult to cope with this evil 
should it become of great magnitude. We may well hope 
that this habit of eating bees is an exceptional one with it. 
The affected bees will be found dead at early dawn in front 
of the hives, 
BEE LOUSE—BRAULA CCA, NITSCH. 
This louse (Fig. 215) is a wingless Dipteron, and one 
of the uniques among insects. It is a blind, spider-like 
parasite, and serves as a very good connecting link between 
insects and spiders, or, still better, between the Diptera, 
