340 ENTOMOLOGICAL NEWS [Nov.,'l8 



Literature Cited. 



Banks, X. 1906. A Revision of the Tyroglyphidae of the United 

 States. U. S. Dept. Agr., Bur. Ent., Tech. Ser. 13. 34 pp., 6 pi. 



Cooley, R. a. 1914. Eleventh Annual Report of the State Ento- 

 mologist of Montana. Bull. Mont. Agr. Coll. Exp. Sta., Xo. 98. 



13 PP- 

 Dalgetty, A. B. 1901. Water-itch, or Sore Feet of Coolies. Jour. 



Trop. Med., 4; 73-77; i pi. 

 Michael, A. D. 1903. British Tyroglyphidae. II. London. 183 pp., 



20 pi. 

 Pepper, W., Schnauss, F. S., and Smith, A. J. 1908. Transient 



Parasitism in Man by a Species of Rhizoglyphus. Univ. Penn. 



Med. Bull., 21 : 274-277. 



Explanation of Plate XIX. 

 All the figures are of Rhizoglyphus sagittatae. 

 Fig. 1 — Adult female, X 140. Fig. 5 — Egg, X 180. 



Fig. 2 — Hypopus, X 140. Fig. 6 — Appendage III of male. 



Fig. 3^Appendage III of female, X 440. 



X 440. Fig. 7 — Posterior ventrum of male. 



Fig. 4 — Appendage I of female. Fig. 8 — Prehypopid palpus, X 140. 



X 440. Fig. 9 — Palpus, adult female, X 440. 



Proterandry and Flight of Bees (Hym.). 

 By Charles Robert.son, Carlinville, Illinois. 



That bees are proterandrous, the males appearing before 

 the females, seems to be well known. ^ But it does not seem 

 to be so well known, if at all, that the females fly a consider- 

 able time after the males disappear. In the Bombidae and 

 Halictidae, except Protcrancr, the females live all winter and 

 come out in the spring. They belong to the males which pre- 

 ceded them in the fall before. But these two families are 

 excluded here on account of the difficulty in distinguishing the 

 broods. 



Of 229 other local bees 184 (80.3 per cent.) are known in 

 both sexes. As far as observed, they begin and end their 

 flight as follows: 



^See Loew, "Blumenbesuch von Insekten an Freilandpflanzen," /: 68, 

 note 2. 1884. 



