136 PSYCHE. [December, 1900. 



Table of the Species of Circotettix. 



A '. Insects of medium or large size. Pronotum acutangulate or rectangulate be- 

 hind, rarely feebly obtusangulate ; first (humeral) lobe of hind wings distinctly 

 elongated, protruding distinctly beyond the general curve of the outer margin, 

 which is generally lobate. 



b 1. Tegmina relatively broad ; general form of hind wings subfalcate, the curve 

 of the outer margin distinctly sinuate, the radiate field very broad and full, and 

 the humeral field relatively broad. 



c^. Hind wings fuscous or else thalassine at base, rarely hyaline, and not 

 crossed by a mesial fuscous band. 



d'^. Hind wings fuscous at base or hyaline with very heavily infuscated 

 radiate veins ; upper fork of first subjacent radial free, and relatively distant 

 from the first superjacent radial. 



e^. Of relatively small size, the tegmina hardly exceeding 25 mm. in 

 length ; hind wings wholly blackish fuscous or with only the apical fourth 

 or less hyaline. . . . . . . . . i. ?naculaius. 



e'^. Of relatively large size, the tegmina nearly 35 mm. in length ; hind 

 wings hyaline with very heavily infuscated radials and the whole base 

 generally black to a varying distance up to more than half of the wing. 



2. carliniamis. 

 d'^. Whole of hind wings thalassine ; upper fork of first subjacent radial 

 running very close to the first superjacent radial and finally uniting with it. 



3. thalassinus. 

 c"^. Hind wings more or less sulphureous* at base, and more or less distinctly 

 crossed by a mesial fuscous band. 



(/\ Basal half of hind wings with very weak coloring, almost hyaline ; upper 

 branch of first subjacent radial free ; apical margin of axillary lobe strongly 

 arcuate, the lobes below it distinctly emarginate ... 4. lobatus. 



d^. Basal half of hind wings with rather strong coloring; upper branch of 

 first subjacent radial uniting with the first superjacent radial ; apical margin 

 of axillary lobe obliquely truncate, but little arcuate, the remaining lobes 

 apically subtruncate. 



ir'. Markings of tegmina less conspicuous, and more distinctly clustered 

 into three transverse fasciae ; upper branch of first subjacent radial run- 



• C. lobatus is described by Saussure as having the basal half of the hind wings ' ' dilute hyalino-sulfurescens vel tlialas- 

 sina" I have seen none with the latter coloring, but it may easily be distinguished from the species of the preceding 

 alternate category by its transverse mesial band, though this is incomplete. 



