HETEROPTEROUS HEMIPTERA. 361 



large spot on the middle of the tip of the hemelytra, that does 

 not exist in this species. 



The interstitiaUs is much like the littoralis Fabr., but in none 

 of my specimens of the latter is there a large yellowish spot on 

 the middle of the tip of the corium. 



5. A. confluenta [confluens].— Black ; membrane of the 

 hemelytra with a blackish band. 



Inhabits United States. 



Antennae pale at base : head and thorax immaculate : corium 

 with a large marginal spot before the middle and another at tip ; 

 two small spots [where'/]; membrane with fuscous nervures 

 and a continuous, blackish, arquated band on the middle : feet 

 whitish; tarsi with blackish tips; thighs with an obsolete brown 

 line : venter whitish at tip. 



Length to tip of hemelytra one-fourth of an inch. 



The band of the membrane does not reach the inner margin. 



It is equal in size to llgata. [ 806 ] 



HYDROMETRA Latr. 



H. lineata. — Fuscous; hemelytra dull whitish with black 

 nervures. 



Inhabits United States. 



Body fuscous, or brown, more or less deep : hemelytra dull 

 whitish or dusky, with black nervures: wings opake white, with 

 black nervures : tergum pale, quadrilineate with black ; two of 

 the lines on the edge and the interval betweeen the two inner 

 lines dull whitish or bright yellow ; the incisures of the segments 

 more or less black : beneath and feet obscure yellowish : thorax 

 with a more or less obvious pale line. 



Length seven-twentieths of an inch. 



This is very much like the stagnorum F., but the hemelytra 

 are not testaceous, and there is no thoracic impressed line. 



\_MaUT\ Body blued-black ; thorax with a pale line ; ani 

 and feet dark honey-yellow; tergum and venter without lines. 



Var. a. australis. Head beyond the eyes a little longer and a 

 little more dilated at tip; second joint of the antennae a little 

 more dilated at tip : abdomen with five lateral whitish points. 



Inhabits New Orleans. 



