1897.] THE SPECIES OF THE GEXUS M KLA Xi )PLUS. 35 



terous and macropterous forms, one being dimorphic. They are 

 widely separated geographically, one ranging from Dakota to Ken- 

 tucky, while the others are found respectively in Florida, Texas 

 and California. They d^x^plebejus Stal. {^ pupceformis Scudd. ), gracilis 

 Brun. {tninutipennis Thom.), i?iops sp. nov., fnargivaius Scudd., and 

 paroxyoidfs sp. nov. 



Collinus series. An extensive group, with nine species ranging 

 over the entire United States excepting Alaska and California. 

 They are alpinus Brun. MS., /;^/^w//7/i' Scudd., w/z/^r Scudd., con- 

 fusus s^. nov., anzona Scudd., keeleri^\\ov^. {icnebrosus Scudd.), 

 deleter Scudd., luridus Dodge, and collinus Scudd. 



Robustus series. Five large species occurring in the southern 

 half of the United States, but hardly known east of the Alle- 

 ghenies. They are differentialis Uhl., robustus Scudd. {ponderosus 

 Scudd. ),///';r^//^j- sp. nov., viola Thom. (affiliatus Uhl. MS.), and 

 clypeatus Scudd. 



Bivittatus series. Five heavy-bodied species belong here, and 

 together they cover nearly the entire continent and include two 

 of the commonest kinds. They species are : femoratus Burm. 

 (^flavovittatus Harr. , milberti 'ievv., edax Sauss., hudsonium Barnst. 

 MS.), bivittatus Say, thomasi Brun. MS., yarrozuii Thom., and 

 olivaceus Brun. MS. 



Punctulatus series. Two species are known, arboreus sp. nov., 

 from the southwest, and punctulatus Scudd. {griseus Thom., helluo 

 Scudd.), from a large part of the country east of the Rocky moun- 

 tains. 



