440 The University Science Bulletin. 



CC. Sides of body not embracing the genital operculum at its ex- 

 tremity (see fig. 10, pi. XLV). 

 D. Pronotum broad and short, anterior enlargement sub- 

 equal in width to entire head. Anterior femur broad and 

 stout without apical tooth. Median tooth half way be- 

 tween trochanter and tibial joint (measured on inner 

 edge). Metaxyphus very long, extending beyond middle 

 of hind coxae, nearly attaining abdomen. 



R. brcvicoUis Montd. 

 DD. Pronotum more slender. The median tooth of anterior 

 femur nearer distal than proximal end. Metaxyphus 

 not often extending bej'ond the middle of hind coxae. 



E. Front femur broad without apical tooth. 



F. Jugae of head more prominent than tylus. 



R. mistralis, sp. new. 

 FF. Tylus fully as prominent as jugae. 



R. jusca P. B. 

 (var. edentula Montd.) 

 EE. Front femur with apical tooth. 



F. Anterior portion of prothorax fully twice as 

 long as thickened posterior portion. Eyes 

 large, plainly greater than interocular space. 

 Jugae of head prominent. Front femur long 

 and slender. Hind femur surpassing middle of 

 penultimate abdominal segment. Caudal fila- 

 ments as long as body. R. drakei, sp. new. 

 FF. Anterior portion of prothorax shorter than 

 above. Eyes not much, if any, greater than 

 interocular space. Jugae not so prominent. 

 Front femur fairly stout. Middle and hind 

 femora short, not attaining middle of penulti- 

 mate segment. 



G. Eyes prominent, plainly transverse, fully 

 as large as interocular space. Anterior 

 part of pronotimi somewhat flattened 

 dorsoventrallv. Hind femora short. 



R. jusca P. B. 

 (=:R. americana Montd.) 

 GG. Eyes not prominent, neither transverse 

 nor as large as interocular space. An- 

 terior part of pronotum more cylindrical. 

 R. quadridentata Stal. 



. Ranatra kirkaldyi Bueno. 



Bueno, J. R. de la Torre, Can. Ent. XXXVII, p. 187, 1905. 



(= -R. fusca Montd., Bui. Soc. Sci. Bucharest, XIX, p. 3; 1910.) 



Original description: 



Abdominis dorsum orange brown; eyes small, not very prominent; pro- 

 thorax much constricted at the middle, bisulcate beneath; wings smoky; 

 anterior femora broad with a prominent tooth near the middle, otherwise 

 smooth; posterior tarsi extending beyond the middle of the air tube; air 

 tube shorter than the length of the abdomen; legs banded. Length from tip 

 of abdomen to tip of rostrum, male, 23 mm. to 26.4 mm.; female, 27 to 31 mm. 



