6 The University Science Bulletin 



17. Water Insects from a Portion of the Southern Utah 

 Desert. R. C. Moore and H. B. Himgerford 407 



18. The Nepidse in America North of Mexico (Heterop- 

 tera) . Plates XLIV-LI. H. B. Hungerford 423 



19. A Study of the Relation Between Function and 

 Growth in Body Cells. Plates LII. M. T. Burrows 473 



20. Notes on the Biology of Curicta (Heteroptera). 

 Plate LIII. Mrs. Grace Olive Wiley 505 



21. Biology and Morphology of Lepyronia quadrangu- 

 laris (Say) — Homoptera, Cercopidse. Plates LIV 



to LXII. Kathleen Doering 513 



