224 CALIFORNIA ACADEMY OF SCIENCES [Paoc. 4th See. 



135. Mayetiola destructor (Say) 



This famous wheat pest, known as the Hessian Fly, is 

 found west of the Cascades in Oregon and often does con- 

 siderable damage. 



136. Aphidoletes meridionalis Felt 



Specimens taken at Forest Grove and Corvallis (Rock- 

 wood and Lovett). 1908, N. Y. State Mus., Bull. 124, 

 p. 397. 



137. Prionellus boulderensis Felt 

 Recorded from Oregon by Felt. 



138. Dasyneura leguminicola (Lintn.) 



The clover seed midge, common throughout western Ore- 

 gon and an important pest in many clover growing sections. 



139. Hormosomyia 12 oregonensis Felt 



Forest Grove, X-10 (Cole). Described as a new genus 

 and species in the Porricondylariae in the article referred to 

 above. It is one of the non-gall-making species. Two males 

 were taken of this species. 



140. Colpodia colei Felt 



Forest Grove, VI-2 (Cole). This species is described by 

 Dr. Felt as related to C. americana. 1919, Ent. News, 

 XXX, p. 223. 



12 I9 !9 > Ent. News, XXX, p. 220. 



