218- AiDKils Entomological Society of America (Vol. III. 



IM Larger, o mm.; whilt- markings f.f the vertex scarcely forming a transverse 

 vitta before the eyes, consisting rf the apical line, a curvcl mark either 

 side, and sometimes two dashes i)ehind these, and four ajjpr* xim.iti- marks 

 on the liase; inhabits eastern states and Canada 21. obscurus ( )sl). 



-. Smaller species, 3J4~4 mm.; markings of the vertex forming a transverse viita 

 before the eyes 20. 



2(1. Vertex forming at least a right angle before, the apex subacute. 21. 



Vertex sIt rt, rvunded at ajjox 2^1. 



21. X'ortex strongly produced, almost acute at apex, its length nearly or cjuitc 



twice the width iK-tween the eyes; pale markings complete but nr t strongly 

 contrasteil; transverse vitta interrupted at the middle and si motimes ( n 



either side; inhabits Florida 19. verecundus VanI). 



-. Vertex shorter, scarcely more than right angled at apex 22. 



22. Vertex paler at base shading to fuscous anteriorly; transverse vitta of four 



subecmal white dashes; apical (lash sht.rt, isf>lated; areolar white sp ts few 

 but well distributed over the elytra; inhabits California an<l .Mexico. 



18. irroratus VanD. 



-, Fcrrn pi fronlalis nearly; general color darker or blackish-fusc( us; areolar 



white spots clustered about the apical transverse nervnres; white markings 



oh the verte.i consistini.^ f f the apical line, a marginr.l lino either side, two 



larger spi ts representing the transverse vitta, and tw^. < thers at the base; 



inhabits Kansas ' 20. scriptus Ball. 



2'.i. Anteri< r edge of the head marked with five uniform contiguous white .spots; 

 angled white line on the base of the front represented by a small but dis- 

 tinct transverse spot; inhabits Jamaica 23. br?vi.s Vanl). 



-. .\nterior marcfin of the head marked with a white ajjical point and an ( bseure 

 pale patch cither side about the ocelli; white mark on the base of the front 

 represented by a short slender arcuated line; inhabits Guatemala. 



22. osborni VanD. 



1. Platymetopius hyalinus Osborn. 



Em. .News. .\i, p. .j()l. 1!K)0. 



This insect is quite aberrant in its genus by its uniformly 

 whitish hyaline elytra crossed by three narrow fuscous bands. 

 Prof. Osborn described il from a series taken from an imported 

 tree at Washington, D. C, and strongly suspected that it might 

 be an exotic form introduced with material added to the Botan- 

 ical Gardens there. In that case it probably has become accli- 

 mated as Mr. C. W. Johnson has sent me a specimen he took 

 near Philadelphia. 



2. Platymetopius nigriviridis Hall. 



lint. Niu-. .\x. p. liiii, I'.HI!). 



Another very distinct little species from California. It is 

 of a pale straw color tinged with green especially on the head, 

 anterior margin of the pronotum and abdomen. On ihe elytra 

 there is a longitudinal line on the clavus, some of the discal 

 nervures near the aj^ex, about four of the oblique costal veinlets 

 l)Osteriorly, and a s])ot at the apex of the inner apical areole 

 blackish. Face immaculate. Vertex of the male short, about 

 right-angled at apex; of the female strongly ])roduced but little 

 shorter than in slossoni. The variety dixianus Ball is still 



