2 EDWARD P VAN DUZEE 



to me in all my studies on the Hemiptera, as has his kind and ready 

 assistance on every occasion on which I have sought it; and I 

 esteem it an honor and privilege to dedicate to him these somewhat 

 disconnected and incomplete notes on our North American Pen 

 tatomids. 



Tv) make this list more generally useful, I have, in some genera, 

 prepared synoptical tables of the species, intended to apply only to 

 those here enumerated. I have also tried to indicate where the best 

 synopses of the genera in the several subfamilies may be found, and 

 have added references and synonymical notes to supplement and 

 correct those in the Lethierry and Severin Catalogue, the generic 

 arrangement of which I have followed. In a few cases it has seemed 

 advisable to add a short diagnosis of species published in works 

 inaccessible to many of our students. 



It has l)een found impossible, in all cases, to give ])roper credit to 

 the friends who have sent me material for study or who have kindly 

 allowed me to retain from such material valuable specimens that 

 were still wanting in my collection. I will ask pardon in advance 

 for such omissions, with the assurance that they were entirely 

 unintentional. 



This list records the occurrence of 191 species in the United 

 States and Canada, a few of which are still unrecognized by our 

 modern students and ma)^ not be valid species. Twenty-eight spe- 

 cies of those here listed are still unrepresented in my collection, t)ut 

 twelve of these belong to the CydiiidcB, a subfamily in which I have 

 done little work. I have indicated these species by an asterisk. 

 One variety and twelve species are here described as new. 



In the arrangement of the subfamilies I have followed the 

 sequence and ordinal rank assigned to them in Lethierry and Sev- 

 erin's Catalogue General des Hemipteres. The generic synonomy 

 established by Bergroth in the Revue d'Entomologie, x, p. 235, 

 189-'>, has, in every case except Orsilochus, b^en rejected by Le- 

 thierry and Severin, and I have not adopted it here. 



The Pentatomidic form a natui-al group which is generally placed 

 at the head of the Heteropterous Hemiptera. They are ordinarily 

 known as "stinck bugs" or " berry bugs," and may be roughly dis 

 tinguished by their oval or lozenge shaped bodies, five jointed 

 antenme, and large triangular scutellum, which may become half- 

 oval, very convex, and cover the entire abdomen. 



