450 The University Science Bulletin. 



of the male genital capsule with the anteapical prolongation truncate and 

 short and well separated from the apical. (See fig. 3, pi. XLVI.) Front 

 femora broad without apical tooth. Hind femora surpassing the middle of the 

 penultimate segment of the body and the hind tarsus reduced to one-sixth 

 of its tibia. (See fig. 4, pi. XLVIII; fig. 1, pi. L; and fig. 15, pi. XLVII.) 



Notes. Described from the following: 



Holotype: Male, Colorado county, Texas, June 24, 1922; Mrs. Grace 



Wiley. 

 Allotype: Female, Colorado county, Texas, June 23, 1922; Mrs. Grace 



" Wiley. 

 Paratypes: Five males and four females, Colorado county, Texas, June 

 23 and June 24, 1922; Mrs. Grace Wiley. 

 Nine males and three females, Gainesville, Fla., June, 1918; C. J. Drake. 

 One female. New Orleans, La., June, 1915. 

 One male, McComb, Miss., July 27, 1921. 

 One female, Fayette, Miss., July 23, 1921; C. J. Drake. 

 One male. Mound, La.,; J. C. Bradley (teneral specimen). 

 One male, Calyell, La., June 16, 1917; H. H. Knight. 

 One male, Kissimmee Lake, Florida; A. N.Resse. 



Total of twenty-nine specimens from Texas, Florida, Mississippi 

 and Louisiana. The last specimen, belonging to the U. S. National 

 Museum, was labeled R. fusca by Doctor Montandon in 1909, and 

 bears the following interesting note: "Alligator flea, water dog, said 

 to bite or sting severely. Swamp east of Lake Kissimmee, Osceola 

 county." 



The holotype and allotype and two paratypes are in the Uni- 

 versity of Kansas collection; paratypes are also in the collection 

 of Dr. C. J. Drake, Ames, Iowa; the United States National Mu- 

 seum, Washington, D. C; J. R. de la Torre Bueno, and the collec- 

 tions of Mrs. Grace Wiley and of the author. 



This species is smaller, slenderer and longer limbed than R. fusca 

 {=R. americana Montd.). It differs also in the following particu- 

 lars : 



1. The jugae more prominent than tylus — not true in R. fiisca P. B. 



2. The eyes are smaller than in R. fusca P. B. 



3. The pronotum is longer; the anterior part two more or less, times the 

 posterior part, whereas in R. jusca P. B. it is P/^ to 1%+. 



4. The sides of prothorax more nearly parallel and posterior swollen part 

 not so swollen. 



5. The hind margin of pronotum roundly and broadly emarginate, whereas 

 in R. fusca P. B. {=zR. americana Montd.) the emargination is deeper and 

 narrower. 



6. The two depressions on the scutellum are deep and pitlike, while in R. 

 fusca P. B. they are shallow and broad. 



