PSYCHE 
}}A JOURNAL OF ENTOMOLOGY 
ESTABLISHED IN 1874 
VOL. XXV JUNE, 1918 NUMBER 3 
Prodryas persephone Scudder. 
CONTENTS. 
On the Existence of Immunity Principles in Insects. R.W.Glaser . . . 39 
Lipeurus doveinom. nov. E.A. McGregor . . . . . » «© «© « « 46 
The Genitalia and Terminal Abdominal Structures of Male Neuroptera and 
Mecoptera with Notes on the Psocidae, Diptera and Trichoptera. G. 
Caan ee STW eS ee epee te LM a Cw WAT 
Notes on Trioza alacris Flor in New Jersey. Harry B. Weiss and Edgar Bs 
Poeaer ree on eRe a A OU So eS pote ok Bae ee ce OOH 
Hemipterolorical Notes. |H. iM. Porshley . 0.9%... ee 
Trichoprosopon Theobald (Diptera; Culicide). C.S. Ludlow. . . . . 66 
HOE Unie mee Tee Wi Om TR win Fe a (Ue) oe oo) OO 
