No. 34-] HEMIPTERA OF CONNECTICUT! GERRIDAE. 663 



Trepobates Uhler. 



T. pictus (Herrich-Schaeffer). 



Wanz. Ins. viii: III, figs. 882, 883, 1848. 



This bright-colored little species is another lake-dweller. In 

 this latitude it is commonly found wingless, although now and 

 again a fully-winged individual may be found. This also has five 

 nymphal instars. It ranges from Canada to Central America. 



Rheumatobates Bergroth. 



(Key to males only.) 



Hind femora. and coxae curiously swollen and distorted rileyi 



Hind femora and coxae simple tenuipes 



(Key to both sexes.) 



Mesosternum yellow, unicolorous rileyi 



Mesosternum yellow with anterior margin and the two posterior 

 diverging bands brownish black, not reaching the posterior margin 

 and dilated near the anterior margin tenuipes 



R. rileyi Bergroth. 



Ins. Life iv, 198, 321, 1892. 



R. rileyi is one of the lacustrine water-striders, although it may 

 occasionally be found on bays in streams. It lies very low in the 

 water. 

 R. tenuipes Meinert. 



Ent. Medd. v, 7, 1895. 



These two species are among the most peculiar of the water 

 striders, on account of the antennal structure of the male. The 

 distribution as published is unconvincing. Both should be found 

 in Connecticut. 



Halobates Eschscholtz. 



H. micans Eschscholtz. 



Nat. Abt. Dorpat, 1, 163, 1823. 



This oceanic species has been found stranded on beaches as far 

 north as South Carolina, but is hardly likely to be seen on the 

 Sound shores of Connecticut. 



Family HYDROMETRIDAE.* 



By J. R. DE LA TORRE-BUENO. 



There is only one genus in this family. 



* This should precede the Miridae ; see footnote on page 658. 



