1910] American Species of Platymetopius 217 



-. Palo markings on the vertex taking the form of a broken transverse vitta 

 before the eyes, more or less complete, the median line short and apical. 15. 



7. Elytra subhyalinc, either cinereous or fulvous, usually clouded and reticulated 



anterior to the anteapical areoles with the white areolar spots apparent; 

 angular white line on the base of the front distinct (except in latus) ... .8. 



Elytra fulvous and opake anterior to the anteapical areoles, the white areolar 

 spots obscure in the female, obsolete in the male 14. 



8. General color cinereous with the elytral markings and areolar spots distinct; 



beneath mostly black; face distinctly infuscated at base and sides 9. 



-. General color fulvous with the elytral markings usually indistinct and the 

 lower surface pale; face but slightly infuscated on the sides, the angular 

 basal mark nearly obsolete 10. 



9. Length 5 mm.; vertex of the male little longer than the width between the 



eyes, ct the female somewhat longer; inhabits from Canada to Georgia. 



5. acutus Say. 



-. Length 4 mm.; vertex very long and pointed, at least twice as long as wide 

 between the eyes; inhabits Florida 9. slossoni VanD. 



10. Face obscurely infuscated on the sides, the angular white line at base distinct. 



11. 



-. Face uniformly yellowish, the angular white line at base obsolete; vertex at 

 least twice as long as wide between the eyes; elytral reticulations and 

 areolar spots obsolete at least in the female 7. latus Baker. 



11. Length at least 5 mm.; general color fulvous 12. 



-. Length 33^-4 mm.; color cinereous, usually tinged with greenish. 



10. cinereus O. tt B. 



12. Male plates short and broad, hardly passing the middle of the pygofers; 



areolar spots practically obsolete anterior to the anteapical areoles; 

 general color darker, the males clearly marked 8. cuprescens Osb. 



-. Male plates long triangular, but moderately exceeded by the pygofers. . . .13. 



13. Last ventral segment of the female scarcely longer than one half its basal 



width; male plates narrow; pronotal vitttv usually distinct. 



5. acutus var. dubius VanD. 



-. Last ventral segment of the female long and narrowed to the nearlv truncated 



apex; much longer than one half its basal width; male plates large and 



broad; pronotal vitt* obsolete 6. oregonensis Baker. 



14. Larger, 414-5 mm.; valve of the male distinctlv angled at apex. 



12. fulvus Osb. 

 -. Smaller, 3-4 mm.; valve of the male scarcely angled at apex. 



11. angustatus Osb. 



15. Face pale or yellow, infuscated at the sides 16. 



-. Face entirely yellow, sometimes showing obsolete irrorations cjuite uniformly 



distributed 17. 



16. Vertex more obtuse; sides of the face distinctly and abruptly darker; the 



angulate pale line at base obvious across nearly the whole width of the 



face; vertex mostly black 14. frontalis VanD. 



-. Vertex more produced; face showing traces of darker irrorations especially 

 at the sides; angulate basal line reduced to an angled transverse spot; 

 vertex mostly white, the markings of the whole upper surface more strong- 

 ly contrasting 15. nasutus VanD. 



17. Vertex longer, about as in nasutus; pleurae and legs mostly fuscous brown; 



inhabits Florida to Colorado and Mexico 16. loricatus VanD. 



-. Vertex shorter, about as in frontalis; pleune and legs whitish or mostly so; 

 inhabits Jamaica 17. nanus VanD. 



18. Male plates triangular, their apex acute or subacute; last ventral segment 



of the female long with its apical margin oblique either side of the middle 



which is distinctly produced and sometimes abruptly angled 19. 



-. Male plates short, transverse and rounded at apex, little exceeding the valve; 

 last ventral segment of the female short, truncate, its hind margin a little 

 sinuated 24. fuscifrons VanD. 



