1907.] NATURAL SCIENCES OF PHILADELPHIA. 475 



the plcurjp ami sides of the pronotum deeper ^reeu, marked with black 

 above under the lateral carinae of the vertex and with a short parallel 

 line below from the anterior angle of the eye. Front almost horizontal, 

 its disk oblong, depressed; its length one-third greater than its width; 

 its sides parallel and its base obtuse!}' angled, the apical angles cut off 

 in line with the sides of the clypeus. Clypeus an equilateral triangle, 

 the three sides rectilinear. Ocelli minute, placed next the lower angle 

 of the eye. Antenna? placed against the inferior edge of the eye; base 

 green cylindrical, next joint brown, surmounted by a slender brown 

 seta. Pronotum of about equal length across its whole width, deeply 

 acutely emarginate behind; carinte distinct, the lateral meeting the 

 median before, curved, at first concentric with the anterior edge, almost 

 attaining the prominent posterior angles; sides tricarinate behind the 

 eyes, the inferior carina bovmded above by a black line, and there are a 

 few obscure marks along the disk anteriorly. Tegulse small with a 

 black disk. Mesonotum with some obscure marks on the disk. Elytra 

 pale greenish pellucid, sparseh' dotted with black along the nervures of 

 the clavus and corium; those along the costa drawn out in oblique 

 false veinlets; tip of the membrane a little smoky with some of the 

 transverse veins brownish. Beneath deeper green, the legs paler with 

 the tips of the tarsal and tibial sjiines and a mark on the apex of the 

 femora exteriorly blackish. Length 7 mm. 



Described from three examples from Florida. One is a fine fresh 

 specimen kindly given me by Mrs. Slosson, the other two are old speci- 

 mens changed to a dull testaceous brown. This species is frequently 

 determined as Monopsis floriche Walker. Mr. Otto Heidemann has 

 kindly compared this with National Museum material and sends me 

 the names used here for the genus and species. These were given by 

 Dr. Uhler, who recognized it as distinct from Monopsis, but who it 

 seems never published either the genus or sj^ecies. 



Subfamily ACHILIDA Stal. 



Genus HELICOPTERA A. and S. (1843), {Elidiptera Spin. 1S39). 



This gcmis was first described as EliiUptcrn by Spinola. and I can see 

 no valid reason for the change made by Amyot and Serville; but as the 

 more recent name has been almost universally adopted I have thought 

 best to retain it here. Our species may be distinguished as follows: 



Color black, front white or banded with white 1. 



Color brown or grayish, 2. 



1. Vertex about as long as broad : front wliite with a black basal band, 



opaca Say. 



