HYSTEEOPTEEUM. 



34 



fuscously biannulate ; vertex in fresli specimens a\ ith a virescent 

 tint ; pronotum with the anterior area and a spot at base 

 ochraceous or pale virescent ; mesonotiim with the posterior angle 



Fig. 172. — Tc/rica viral imixta. 



virescent ; tegmina brownish ochraceous, the venation with a 

 virescent tint, a pale virescent spot on ba.sal costal area, and a 

 large pale longitudinal suffusion beyond middle of costal marginal 

 area. 



Var. The virescent tint obsolete, and the whole submarginal 

 costal ai'ea of tegmina pale flavous-virescent, the basal spot and 

 longitudinal suffusion being united. 



Length inch tegm. millim. 



Hah. Tenasserim ; Myitta (Dohert)/). 



Genus HYSTEROPTERUM. 



Hvsteropternm, Avri/. S,- Serv. Hem. p. 519 (1843) ; Fieb. Cic. Rtv. et 

 '^Mng. Zool. 1875, p. 365; Melich. Horn. Faun. Ceylon, p. 76 (1903). 



Type //. immaculatum, Fabr., a Paleearctic species. 



Distribution. Palaearctic and Oriental Regions. 



Head (including eyes) as wide as pronotum ; vertex quadrangular, 

 about as broad as long, its anterior margin slightly angularlv 

 produced in front of eyes, its lateral margins ridged ; face scarcely 

 longer than greatest breadth, posteriorly moderately amnliate, 

 centrally and sublaterally carinate, the sublateral carinations curved 

 and meeting at anterior margin ; legs moderately short and stout ; 

 pronotum a little shorter than mesonotum, truncate ' posteriori}^ 

 and subangularly produced anteriorly, faintly centrally carinate ; 

 mesonotum with its anterior margin ridged and somewhat widely 

 tricarinate ; tegmina placed vertically, narrowed to apices which 

 are rounded, the upper two longitudinal veins forked at about one- 

 third before their apices and excluding basal area with numerous 

 faint subobsolete transverse veins. 



1904. Hysteropterum subfasciatum, Melich. Horn. Faun. Ceylon, 

 p. 78 (1903). 



Pale brownish-ochraceous ; tegmina with two oblique piceous 



