54 I Dr. W. G. Ridewood on Flying-fishes. 



vin. t.) bears many more bristles than in the allied species, 

 and is also more strongly produced posteriorly. In the 

 clasper and its two processes,, P and F, C. consors agrees 

 rather closely with C. herileyi ; but P is broader in consors, 

 and the proximal edge of F is not angulate. The ninth 

 sternite (ix.st.), however,, is decidedly narrower distally than 

 in C. henleyi. The seventh sternite of the ? (PI. XV. fig. 8) 

 is obliquely sinuate, the lobe below the sinus being much 

 produced and rounded, except ventrally, while the lobe 

 above the sinus is usually narrow and pointed. This upper 

 lobe varies greatly in length, being sometimes very short and 

 rounded. 



A long series of both sexes from Djarkent, Semitchenskoi, 

 East Turkestan, October 15th, 1912, off Meriones tamaricinus. 



EXPLANATION OF THE PLATES. 

 Plate XIV. 



Fig. 1. Clasping-organs of J of Ctenophthalmus dolichus, sp. n. CI, 

 clasper ; P 1 and P 2 , upper and lower processes of same ; F, 

 movable process; vin.st. and ix.st., eighth and ninth sternites. 



Fig. 2. Seventh and eighth abdominal segments of 5 of Ctenophthalmus 

 dolichus. 



Fig. 3. Clasping-organs of $ of Neopsylla teratura, sp. n. 



Fir/. 4. Ventral arm of ninth sternite of <$ of Neopsylla bidentatiformis, 

 Wagn. (1893). 



Plate XV. 



Fig. 5. Clasping-organs of <$ of Ceratophyllus teretifrons, sp. n 



Fig. G. Ninth sternite and apex of penis of $ of Ceratophyllus repandus, 



sp. n. 

 Fig. 7. Clasping-organs of J of Ceratophyllus consors, sp. n. 

 Fig. 8. Seventh and eighth abdominal segments of § of Ceratophyllus 



consors, sp. n. 

 Fig. 9. Seventh and eighth abdominal segments of 5 of Ceratophyllus 



repandus, sp. n. 



LXVII. — Notes on the South-American Freshwater Flying-fish, 

 Gastropelecus, and the common Flying fish, Exoccetus. 

 By W. G. Ridewood. 



[Plate XVI.] 



Although less popularly known than the common flying-fish, 

 Ewoccetus, the flying gurnard, Daetylopterus, and the African 

 freshwater flying-fish, Pantodon, the freshwater flying-fish of 

 Guiana, Gastropelecus, may ultimately prove to have a better 



