456 The University Science Bulletin. 



PLATE XLV. 



Fig. 1. Clasper of male of R. elongata Fab., determined by Doctor Mon- 

 tandon. S, subapical tooth. 



Fig. 2. Genital capsule of male of R. elongata Fab., determined by Doctor 

 Montandon. Compare figures 1 and 2 with figures 3 and 4. Note the differ- 

 ences in shape of claspers, their relative lengths as shown in figures 2 and 4. 

 The intromittent organ, I, is also often characteristic of a species, but not 

 always, and subject to some variation. The capsule itself in Ranatra is of 

 little value. 



FiGS^ 3 AND 4. Clasper and capsule of male R. brevicollis Montd. from 

 California. 



Fig. 5. Inside view of left clasper of Curicta drakei, sp. new. Compare 

 with figure 8, C. howardii Montd. The shape of the clasper near the base is 

 not the same in the two species. 



Fig. 6. Male genital capsule of C. drakei, sp. new, viewed from right side. 



Fig. 7. Male genital capsule of C. howardii Montd. 



Fig. 8. Inside view of left clasper of C. hoxmrdii Montd. 



Fig. 9. Ventral view of head of Ranatra to show the antennae, which lie 

 hidden. Sometimes they are covered with debris, which should be scraped 

 away. It is often wise to relax the specimen and draw the antenna into a 

 more exposed position. The front coxa also sometimes obscin'es the view and 

 should be moved while specimen is relaxed. 



Fig. 10. Lateral view of caudal end of abdomen and base of respiratory 

 filaments of Ranatra nigra H. S. C, connexivum. R, respiratorj' filaments. 

 0, operculum of genital segment, considered in this paper as last abdominal 

 segment. P, considered in this paper as the penultimate abdominal segment. 



Fig. 11. Lateral view of caudal end of abdomen and base of resjiiratory 

 filaments of Ranatra jabricii Guer. from Cuba. Montandon says it is identical 

 with R. annulipes Stal from Brazil. 



Fig. 12. Dorsal view of head of Ranntra. B, beak. ./. jugum. T. tylus. 



