2.08 rjiOLEEDjyus of the XJTloyjL MVSELM. vol.xx. 



Iami;;!!! of body, iMiiK*. 17..">inin.: tcjiinina, liniii.; liiiid femora, 0.."» mm. 



Two males. Diiijio Bliift. North Carolina, November 15, Parker- 

 May nanl. 



hi ffeiieral appearance this insert has a stronp; resemblance to .1/. 

 att(')ii«(tiis fr()m the same rej;ion. 



17. FASClxVTlS SKKIES. 



This <;roup is not very homo<ieneous, comprisin;.!- forms of conisider- 

 able dilVerence in ai)pearauce and structure, but which have a numl»er 

 of important ]M)ints in common. It is coinpose«l in i»art of brachyi>ter- 

 ous and in part of nuiv*ropterous forms. One sj)ec'ies is dimorphic in 

 this respect, and the others, whether macroi)terous (one onlyj or 

 brarhyi>terous (six in number), are excejJtionally sliort-winj:ed or 

 exceptionally lon<i-winf?ed for their type. The antennae are very vari- 

 able in len;:th. beinj;' sometimes (juite similar, sometinu's (juite dissimi- 

 lar, in the two sexes aiul varying in the male from three-tifths as lon^ 

 as the hind femora to eipuil their length, an<l in the female from one- 

 half to four-tifths the length of the hin«l femora. In size they range 

 from very small to a little above the medium. 



The prozona of the male varies from (piadrate to longitudinal in 

 both brachypterous and nmcropterous forms. The intersjtace 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 tiansverse to twice 

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

 comparable with the length of the ])ronotum and are well rounded, but 

 in the dimor])hic form they are api *ally subacuminate and twice as long 

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

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

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

 Tl'.e 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 comj>;. :^t;d apically. The furcula is usually very feebly 

 developed, but th/ve species have slender fingers extending some dis- 

 tance over t'ue supraanal plate. The cerci are rather large, compressc<]. 

 generally incurved laminae, generally of considerable breadth, but in 

 one instance exceptionally slender, generally more or less constrict( <l 

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

 again ai)ically, rounded and not acumiiuite (in one species emarginatoi 

 at tip. The snbgenital plate again varies much, but is always lon.i^cr 

 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 geogTai>hical as structural relation. 

 One is known only from the extreme north in Labrador and Cireeulaml: 



