258 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



Length of body, male, 17.5 min. ; tegmiua, 4 mm. ; hind femora, 9.5 mm. 



Two males. Dingo Bluff', North Carolina, November 15, Parker- 

 May uard. 



In general appearance this insect has a strong resemblance to Jf. 

 attenuatus from the same region. 



17. FASCIATUS SERIES. 



This group is not very homogeneous, comprising forms of comsider- 

 able difference in appearance and structure, but which have a number 

 of important points in common. It is composed in part of brachypter- 

 ous and in part of macropterous forms. One species is dimorphic in 

 this respect, and the others, whether macropterous (one only) or 

 brachypterous (six in number), are exceptionally short-winged or 

 exceptionally long- winged for their type. The antennae are very vari- 

 able in length, being sometimes quite similar, sometimes quite dissimi- 

 lar, in the two sexes and varying in the male from three-fifths as long 

 as the hind femora to equal their length, and in the female from one- 

 half to four-fifths the length of the hind femora. In size they range 

 from very small to a little above the medium. 



The prozona of the male varies from quadrate to longitudinal in 

 both brachypterous and macropterous forms. The interspace between 

 the mesosternal lobes in the same sex is also very variable in each set 

 of forms, and in both together ranges from a little transverse to twice 

 as long as broad. The tegmina in the brachypterous forms are usually 

 comparable with the length of the pronotuni and are well rounded, but 

 in the dimorphic form they are apically subacuminate and twice as long- 

 as the pronotum (as in one of the brachypterous forms) or far surpass 

 the hind femora and are broad and well rounded apically; while in the 

 single macropterous form they barely reach the tip of the hind femora. 

 The hind tibiae are likewise very variable in color, sometimes within the 

 species, and have from nine to twelve, usually eleven, spines in the 

 outer series. 



The supraanal plate is generally rather long triangular, and rather 

 flat, with but feebly elevated margins, except in one instance, where it 

 is strongly compressed apically. The furcula is usually very feebly 

 developed, but three species have slender fingers extending some dis- 

 tance over the supraanal plate. The cerci are rather large, compressed, 

 generally incurved laminae, generally of considerable breadth, but in 

 one instance exceptionally slender, generally more or less constricted 

 mesially, in two species greatly, and, with a single exception, enlarged 

 again apieally, rounded and not acuminate (in one species emarginate) 

 at tip. The subgenital plate again varies much, but is always longer 

 than broad, generally moderately broad and nearly equal and usually 

 a little elevated apically, the apical margin always entire. 



The eight species have as little geographical as structural relation. 

 One is known only from the extreme north in Labrador and Greenland 5 



