134 MISC. PUBLICATION 5 00, U. S. DEPT. OF AGRICULTURE 



Figure 9. — A, labial palpus of Stenoponia americana, female ; B, genal ctenidium 

 of Gtenophthalmus pseudagyrtes, male ; C, head of Paratyphloceras oregonensis, 

 female; D, metathorax of Rectofrontia fraterna, female; E, metathorax of 

 Micropsylla sectilis. 



