462 The University Science Bulletin. 



PLATE XLVIII. 



Fig. 1. Front femur, tibia and tarsus of Ranatra buenai, sp. new. Note its 

 very slender form and the position of the median tooth. 



Fig. 2. Ranatra brcvicollis Montd. The median tooth is nearer the middle 

 than in any of the others. The tibia is relatively longer. 



Fig. 3. Ranatra drakei, sp. new. Note the slender form and the position of 

 the aincal tooth. 



Fig. 4. Ranatra australis, sp. new. It lacks the apical tooth, and the an- 

 terior portion of the femur is not enlarged toward the distal end as in 

 R. jusca P. B. 



Fig. 5. Ranatra fiisca P. B. (= R. ainericana Montd.). From Ithaca, N. Y. 



Fig. 6. Ventral view of head and prothorax of R. buenoi, sp. new. To show 

 the deep longitudinal trough. Compare with figure 10, which lacks it. 



Fig. 7. Ranatra kirkaldyi Bueno. Note that the femur is not constricted 

 in the region of the median tooth. Compare with R. fusca P. B., figure 5. 

 This from Kansas. 



Fig. 8. Ranatra nigra H. S. {=: R. protcnsa Montd.) 



Fig. 9. Ranatra kirkaldyi Bueno var. hofjnianni new. Apical tooth or 

 marked sinuosity present. From Minnesota. 



