HOW TO KNOW THE IMMATURE INSECTS 



1937. Aquatic Diptera. Pt. IV. Chironomidae; subfamily Chirono- 

 minae. Ibid. 210:1-56. 

 Malloch, J. R. 1917. A preliminary classification of Diptera, exclusive 



of Pupipara, based upon larval and pupal characters, with keys to 



imagines in certain families. Pt. I. Bull. III. St. Lab. Nat. Hist. 



12:161-409. 

 Phillips, Venia Tarris. 1946. The biology and identification of trypetid 



larvae (Trypetidae). Mem. Amer. Ent. Soc. 12:1-161. 

 Thomsen, L. C. 1937. Aquatic Diptera. Pt. V. Ceratopoginidae. Cornell 



Agr. Exp. Sta. Mem. 210:57-80. 



Order HYMENOPTERA 



Bischoff, H. 1927. Biologie der Hymenoptera. 597 pp. Springer, Berlin. 



Duncan, C. D. 1939. A contribution to the biology of the North Ameri- 

 can vespine wasps. Stanford Univ. Pub. Univ. Ser. Biol. Sci. 8(ll):l-272. 



Yuasa, H. 1923. A classification of the larvae of the Tenthredinoidea. 

 111. Biol. Mon. 7:1-172. 



>^^^^«»^' . -^ '--^S.,^ 



223 



