372 Rev. T. A. Marshall's Monograph of 
darkened towards the extremity, all the joints longer than in the 
preceding species, 3rd one-fourth longer than the following joint. 
Fovea of the mesonotum linear, impunctate ; metathorax shining, 
hardly marked with a few scattered rugosities. Wings hyaline ; squa- 
mula pale testaceous ; nervures and stigma pale brown, the latter 
more elongate than in pugnatrix, as also is the radial areolet, which 
more nearly approaches the tip of the wing. Legs whitish-yellow, the 
tips of the tarsi dusky ; femora and tibiae not remarkably short or 
stout. Abdomen as in the preceding. Terebra very short, falcate, 
ascending, the valves slender. Length, 1^; wings, nearly 4 lines. 
Taken at Nunton^ near Salisbury. 
XV ii. Ojrtho STIGMA^ Ratzeburg. 
Ratz., Ichn. d. Forst., i., 53 ; ii., 71 (1844). 
Fourth joint of the antennas shorter than the 3rd. Mesotho- 
racic sutures effaced ; dorsal fovea punctiform ; metathorax almost 
smooth ; furrow of the mesopleurae punctate. Stigma thicker 
than the metacarp, linear, elongate, reaching to the middle of the 
radial areolet, emitting the radial nervure near its base ; 1st 
cubital areolet complete, as large as the 1st discoidal ; 2nd com- 
plete, elongate, slightly contracted towards the outer end ; 2nd 
abscissa twice as long as the 1st intercubital nervure ; recurrent 
nervure short, incomplete, somewhat evected ; cubital and anal 
nervures decolorous, the latter springing from the middle of the 
extremity of the 2nd discoidal areolet ; pobrachial areolet of the 
hindwing longer than half the prgebrachial. Abdomen of the 9 ' 
viewed from above, oval-lanceolate, compressed beneath ; that of 
the $ oblong, depressed. Terebra exserted, falcate. 
This genus, of which only one species is known, closely 
resembles the following : the wings present the only 
tangible difi'erence_, yet among small specimens some are 
to be found with the stigma considerably attenuated, 
reducing the distinctive character to almost nothing. 
Forster has remarked of the genus Ortliostigma, Ratz., 
that though "obviously belonging to the group of Alysia, 
it cannot be satisfactorily identified from the scanty 
notices given by Ratzeburg, nor yet from the figure in 
the Ichn. d. Forstinsecten, Bd. i., pi. vii., fig. 13.^' I ven- 
ture to contest this assertion, having no doubt that 
Ortliostigma is identical with Forster's own genus Ischno- 
carp a J which is jusb as imperfectly characterised as that 
