1878.] 441 [Uhler. 



many other hemiptera, become suffused with rufous color, no doubt 

 arising from a ripe maturity of development. 

 2. R. quadridentata. 



Ranatra quadridentata Stal, Ofv. af Koenigl. Vet. Akad. Forh., 

 1864, p. 204. 



An imperfect specimen, without locality indication, seems to belong 

 to this species. It is found in Mexico, and more rarely in various 

 parts of the United States. A good specimen without the locality, is 

 in the collection. 



BELOSTOMID^. 



Zaitha Am. et Serv. 

 Z. fluminea. 



Belostorna fluminea Say, Hemipt. New Harm., 37, No. 1. Perthos- 

 toma aurantiacum Leidy, Journ. Acad. Philad., 2d ser., I, 60. 



No. 74, Harris' Collection. " Belostorna fluminea Say, MS., de- 

 termined by himself. Salt pond margin, May 1, 1825, and Ipswich, 

 Mr. Oakes, Sept. 5, 1832. Found in great numbers in the stomach 

 of a duck." 



This species is common in many parts of the Union, sometimes ap- 

 pearing in great numbers about the muddy beds of streams, beneath 

 the stones, early in autumn. The female seems to be the broader 

 form of the two sexes. A specimen is in the collection with printed 

 label No. 335, 



Benacus Stal. 

 B. griseus. 



Belostorna grisea Say, Hemipt. New Harm., 37, No. 2. Belostorna 

 Haldemanum, Leidy, Journ. Acad. Philad., 2d ser., I, 66. Benacus 

 Haldemanus Stal, Ofv. Kong. Vet. Akad., Forh., 1861, p. 205. Belos- 

 torna angustatum Guerin, La Sagra, Hist Nat. Cuba, 420. 



No. 108, Harris' Collection. "North Carolina, April, Mr. Nuttall." 



Occasionally occurring in most of the regions near the eastern 

 coast of the United States, from New England to Forida. It inhabits 

 Cuba, also, from which place I have a specimen, sent to me through 

 the kindness of Prof. Felipe Poey. 



Belostoma Lat. 

 B. americanum. 



Belostorna americanum Leidy, Journ. Acad. Philad., 2d ser., I, 66. 

 Belostoma grandis Fab., var. americanum, teste Leidy. 



