244 THE CANADIAN ENTOMOLOGIST. 



The typical form of lateralis is common in the Middle States, extending 

 flir to the east and far to the West, and presenting a number of conspicu- 

 ous forms. Individuals more or less suffused with red may occur in 

 almost any of the species, and especially in this. However, in the 

 mountains of Southern California I found a uniform race of small roseate- 

 hued individuals that certainly deserve separate recognition, and I have 

 given them the form name roseiis. The hcteolus of Distant appears to be 

 but a mere variety oi lateralis. Tho. piinctatus of Signoret (determined at 

 various times for me as ventralis, which is a far larger and paler form) 

 ranges from the North-eastern United States into Mexico and Central 

 America, and as a general thing is remarkably uniform for one of this 

 group. I collected a smaller paler form in Nicaragua. Structurally, 

 punctatus is extremely close to lateralis. 



The specific group, pictipes of Stal, is essentially southern, forms of the 

 species being abundant in West Indies, Mexico, Central and South 

 America. I have many specimens of a very uniform race from Louisiana, 

 and doubtless it will be found eastward and westward in the Gulf States. 

 Most abundant in Nicaragua is the form of this species named iiebulosus. 



Genus Arhyssus, Stal. 



Stal made punctiventris of Dallas the type of this group. The short 

 antennse, general form, and the very bristly head and thorax, are quite 

 characteristic. After I had separated all of my material of this group, a 

 search was made for deiermmed pu;ictiventr is. Curiously enough, species 

 were found in each of the other three genera which had been determined 

 ZLS punctiventris, hut none in the group of which it had been made the 

 type. Although published seven years previously, yet not one of the 

 Dallas species is mentioned in the ^'Monographic du Genre Corizus." But 

 I believe that Signoret had the true punctiventris of Dallas, and described 

 it under the name oi BoJiemani. It is found throughout the United States, 

 and occurs in most general collections of Heteroptera, though I have yet 

 encountered no specimens properly named. Pilosus 2^^d parvicornis, both 

 of which I have collected in the extreme south, have no good structural 

 characters to separate them from punctivetitris except size, and numerous 

 intermediate forms occur. The borealis of Uhler had been reduced to 

 pujictivefitris, but this reference is in doubt, since of various forms deter- 

 mined 2^% punctiventris for me by Dr. Uhler, none are even Arhyssus. 



