1()4 



DIPTERA OF iMINNKSOTA. 



NYCTERIBIIDAE. 

 Bat Ticks. 



Fig. 162. Female Bat-tick, sliowitig peculiar appearance of upper surface. From Sharp. 



Individuals of this family are rare. North America has only 

 five species, belonging to four genera, and we have never taken them 

 in Minnesota. They are wingless, and live parasitically on bats. 

 They have no compound eyes. Their reproduction is like that of the 

 Hippohoscidac. 



BRAULIDAE, 

 Bee Louse. 



]"ig. 1(13. r>cc Louse. After Mcinert. 



One representative known, Braithi coeca. about one-sixteenth of 

 an inch long, which lives as a parasite upon the honey bee, and is said 

 to be especially fond of the queen bee on account of the exposed 

 membranes between its body segments. It has no wings, and no com- 

 pound eyes, yet in spite of its name, coeca, it is not blind. It is believed 

 that its reproduction is like that of the Hippohoscids and Nyctcrihiids, 

 though there is doubt expressed upon this point. 



