238 MISC. PUBLICATION 4 7 0, TJ. S. DEPT. OF AGRICULTURE 



Figuee 103. — Clypeus (A), and last visible abdominal sternite of male (B) and 

 of female (C) of Ghrysobothris socialis. 



Male. — Broadly elongate, moderately convex above, subopaque, bronzy green, 

 with a distinct bluish tinge, the elytra ornamented with blackish-violaceous 

 spots ; beneath varying from bronzy green to violaceous blue, and more strongly 

 shining than above. 



Head bronzy green, with a slight golden tinge, vaguely, longitudinally carinate 

 on occiput, with an indistinct, transversely arcuate, elevated carina on vertex; 

 front more or less uneven ; surface coarsely, densely ocellate-punctate on front, 

 more finely, deeply punctate on occiput, sparsely clothed with short, erect, 

 inconspicuous hairs behind clypeus, intervals densely granulose ; clypeus deeply, 

 triangularly emarginate in front, with an acute, median notch, slightly rounded 

 on each side. Antenna brownish cupreous, with a faint purplish tinge, slightly 

 narrowed to apex ; intermediate segments compact, as wide as long, broadly 

 truncate at outer margins ; third segment as long as the following three segments 

 united. 



Pronotum nearly twice as wide as long, slightly narrower at apex than at base, 

 widest at middle ; sides slightly, arcuately rounded ; posterior angles obtuse ; 

 anterior margin sinuate, with a vague, broadly rounded, median lobe; base 

 strongly, arcuately emarginate on each side, median lobe strongly produced and 

 broadly rounded ; disk moderately, uniformly convex, without depressions or 

 callosities; surface glabrous, finely, densely, uniformly punctate, more confluently 

 punctate at sides, intervals densely granulose. 



Elytra slightly wider than pronotum, nearly twice as long as wide, widest 

 behind middle ; sides sinuate and slightly diverging from humeral angles to 

 behind middle, then arcuately converging to tips, which are separately broadly 

 rounded, but not extending to tip of abdomen; lateral margins coarsely serrate 

 posteriorly; basal depressions broad and deep; humeral depressions broad and 

 shallow; surface glabrous, without costae or foveae. finely, rather sparsely 

 punctate on median parts, coarsely, confluently ocellate-punctate. and more or 

 less rugose at base and sides, intervals densely, finely granulose, each elytron 

 ornamented with blackish-violaceous spots as follows: A rounded, median spot 

 at basal third ; two similar spots at middle, one near lateral margin and a larger 

 one near sutural margin ; and an irregular, oblique spot near apex. 



Abdomen beneath sparsely, shallowly punctate en median parts, more coarsely, 

 densely toward sides and on apical sternite, punctures elongate and open pos- 

 teriorly, clothed at sides with a few semierect, inconspicuous hairs, without 

 distinct lateral callosities, intervals densely granulose, last visible sternite slightly, 

 arcuately emarginate at apex, scarcely produced at external angles, without a 

 distinct submarginal ridge, lateral margins not serrate : eighth tergite densely, 

 coarsely punctate, densely granulose, broadly rounded at apex. Prosternum 

 coarsely, sparsely punctate, transversely rugose anteriorly, clothed with a few 

 short, inconspicuous hairs ; anterior margin broadly, arcuately rounded, but 

 without a median lobe. Anterior femur with a broadly rounded tooth, which is 



