REVISION OF STREPSIPTERA- — PIERCE. 221 



Plate 7. 



Family Xenid.e (males). 



Page. 



Fig. 1. Acroschismus pallidus texensis, metathorax (the same dimensions apply- 

 to A. hunteri) 127 



2. Acroschismus bowditchi, metathorax, to same scale as preceding 130 



3. Acroschismus pecosensis, metathorax, to same scale as preceding 128 



4. Xenos vesparum, metathorax, to same scale as preceding. (This illus- 



trates specimens sent the writer by Karl Hofeneder, of Innsbruck, 



Austria, which were bred from Polistes gallica diadema) 117 



5. Acroschismus pallidus texensis, face 127 



6. Acroschismus bowditchi. face, to same scale as preceding 130 



7. Acroschismus pecosensis, face, to same scale as preceding 128 



8. Xenos vesparum, face, to same scale as preceding 117 



9. Acroschismus pallidus texensis, genitalia 129 



10. Acroschismus hunteri, genitalia 130 



11. Acroschismus boivditchi, genitalia 130 



12. Acroschismus pecosensis, genitalia 128 



13. Xenos vesparum, genitalia 117 



Drawings by the author. 



Plate 8. 



Family Xenid/E (males). 



Fig. 1. Acroschismus pecosensis, antenna 128 



2. Acroschismus pallidus texensis, pupa 127 



3. Acroschismus pallidus texensis, pupa in puparium 127 



4. Acroschismus pecosensis, tibia and tarsus 128 



Illustrations from photomicrographs taken by Herbert S. Barber and the 



author, and retouched by the latter. 



Plate 9. 

 Family Xenid.e (females). 



Fig. 1. Acroschismus bowditchi, cephalothorax 130 



2. Acroschismus bruesi, cephalothorax 124 



3. Acroschismus hubbardi, cephalothorax 122 



4. Acroschismus hunteri, cephalothorax 130 



5. Acroschismus pallidus texensis, cephalothorax 127 



6. Acroschismus pallidus texensis, larva, anterior portion 127 



7. Acroschismus pecosensis, cephalothorax 128 



8. Acroschismus maximus, cephalothorax 132 



9. Acroschismus texani, cephalothorax *. . 132 



10. Acroschismus wheeleri, cephalothorax 129 



11. Acroschismus rubiginosi, cephalothorax 132 



Illustrations from photomicrographs made by E. S. Tucker and H. S. Bar- 

 ber and the author, and retouched by the latter. 



Plate 10. 

 Family Xenid^e (males). 



Fig. 1. Paraxenos erberi, wing (after Saunders) 141 



2. Pseudoxenos schaumii, wing (after Saunders) 135 



3. Apractelytra schwarzi, mouth parts, side view 152 



4. Apractelytra schwarzi, metathorax, dorsal view 152 



