DIPTERA 



325 



There is a yellowish winged species, Lynchia americana, which is rather 

 common on owls, and on the ruffed grouse. 



Family Braulid^e 



The Bee-lice 



This family includes only a single genus, Braula, of which there is 

 only one well-known species, Braula cceca. This is a minute insect, T V of 

 an inch in length, which is parasitic upon the honey-bee (Fig. 568). 



Fig. 568. — Braula caeca. (From Sharp after Meinert.) 



It is found clinging to the thorax of queens and drones. It is wingless 

 and also lacks halteres; the head is large; the ocelli are wanting; the 

 eyes are vestigial; the legs are comparatively short; and the last seg- 

 ment of the tarsi is furnished with a pair of comb-like appendages. 



The bee-louse lays eggs and therefore does not seem to be a member 

 of the Pupipara. 



FAMILIES OF DIPTERA NOT DISCUSSED 



The order, Diptera, contains a large number of families the mem- 

 bers of which are not likely to come within the field of the general stu- 

 dent of entomology. The following list includes those families of flies 

 which have not been discussed in this work but of which the student can 

 find an account in " An Introduction to Entomology " by J. H. Corn- 

 stock. 



Thaumaleidae Helomyzidas Sepsidas 



Xylomyidas Borboridae Diopsidae 



Xylophagidae Phycodromidae Canaceidae 



Coenomyidas Sciomyzidas Asteiidae 



Nemestrinidas Sapromyzidas Geomyzidas 



Apioceridse Lonchaeidae Milichiidae 



Conopidae Tanypezidae Ochthiphilidae 



Clusiidae Micropezidae St.reblidae 



