IOO CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



S. opalinus Osborn. 



Rept. N. Y. St. Ent., xx, 525, 1905. 



Gray, paler than immistus, vertex pale with faint markings. 

 Pronotum pale brown, apex of scutellum yellowish. Elytra gray- 

 ish to pale brown, nervures brown, some broadly darker, claval 

 veins ending in dark spots along suture, between which are formed 

 two large sutural spots and three just outside of claval vein, white, 

 opalescent. 



Found under field conditions often in similar habitats with 

 immistus. 



Platymetopius Burmeister. 

 Proceps Mulsant and Rey. 



Vertex long, pointed, front very narrow, elytra with two cross 

 veins between the sectors and several small costal veinlets. The 

 elytron contains five apical and three anteapical cells. 



Both in structure and food habits these resemble the species of 

 Deltocephalus, but are not found to occur on grasses in such 

 abundance. Most of the species feed on herbaceous or low vege- 

 tation, and are often found only in boggy or moist habitats. 



Key to Species. 



1. Elytra usually with inscribed pigmentation, costal veinlets present 2 

 Elytra whitish hyaline, crossed by three distinct transverse fuscous 



vittae, costal veinlets absent hyalinus 



2. Face light or yellowish, often dark margined 3 



Face dark or brownish, 5 mm. in length, with a broken pale, trans- 

 verse band before the eyes magdaiensis 



3. Markings on vertex in the form of lineations usually with a pale 



median line on vertex. Color brownish or fulvous 4 



Markings on the vertex in the form of transverse vittae, color 

 black, face yellow, dark margined frontalis 



4. Face yellowish, dark margined, distinctly angled above and with 



angular white line on base distinct 5 



Face without dark margin, bluntly angled at base, angular white 

 line very faintly showing 6 



5. Vertex not quite twice as long as width between the eyes, general 



color cinereous acutus 



Vertex more pointed, about two and one-half times as long as 

 width between the eyes, color bright cuprescent cuprescens 



6. Length 3-4 mm. ; light in color with greenish tint, valve of male 



almost rounded at apex angustatus 



Length 4.5-5 mm., darker, fulvous, valve of male distinctly angled 



fulvus 



P. hyalinus Osborn. 



Ent. News, xi, 501, 1900. 



Whitish or yellowish hyaline, elytra crossed by three narrow, 

 transverse brown bands, one each across middle and apex of 

 clavus, and another just before apical cells. Vertex well angled a 

 half longer than width between eyes, rather uniform yellowish. 

 Length 4.5 mm. 



