PLATE LI. 



(All photographs natural size.) 



Photo 1. R. quadridenlata Stal. Small specimen taken by Doctor Snow- 

 in Arizona. 



Photo 2. Curicta howardii Moutcl. Photograph from male belonging to 

 Professor Barber. Compared with type at Washington by Doctor Drake. 



Photo 3. Ranatra fusca P.B. Specimen from Minnesota with very short 

 but perfectly formed re.spiratory filaments. The tijjs are normal. 



Photo 4. Curicta drakei, sp. new. Male holotype. 



Photo 5. Nepa cinerea L. Male from Europe. Compare with A^cpa api- 

 culcUa Uhl. from Minnesota, photo 8. then note structural differences figured 

 on plate XLVII. 



Photo 6. Curicta drakci, sp. new. Female allotype. 



Photo 7. Ranatra fusca P.B. Shows how long the respiratory filaments 

 may be and how marked the apical tooth of front femur. 



Photo 8. Nepa apiculata Uhl. Female from Minnesota. 



(468) 



