46 PROCEEDINGS OF THE AMERICAN ACADEMY. 



— Lancaster, Aug. 1, Kern City, Aug. 4, Tulare, Aug. 5, and Lathrop, 

 Aug. 17 (2/) J , 179)5 which may be called Opeia tesiacea. 



It is a slenderer insect with longer tegmina, which equal ( 9 ) or sur- 

 pass ( 1^ ) the abdomen and reach the base of the geniculation of the hind 

 femora, and with a paler, nearly uniform coloring with scarcely any green 

 in it, and immaculate tegmina in the female, where at most they merely 

 have an obscure unbroken fuscous streak in the proximal half of the 

 median area, while in 0. obscura the female tegmina have the median 

 area nearly always distinctly marked with fuscous, broken into quad- 

 rangular spots ; in the latter species the upper half of the lateral lobes 

 is generally marked with a broad or narrow fuscous (rarely greenish) 

 stripe, in both sexes, extending in extreme cases upon the head as a 

 postocular band ; this is extremely rare in 0. testacea and obscure at 

 best, though the lateral lobes are occasionally infuscated as a whole; 

 generally the whole pronotum is uniform pale testaceous ; the hind tibial 

 spurs are more slender in the new species, and the face a little more 

 oblique in both sexes. Measurements of average specimens are as fol- 

 lows. Length (if body, cf, 14 mm., 9, 25.5 mm. ; antennjB, ^, 5.75, 

 9, 8.9 mm.; tegmina, ^, 9.5 mm,, 9} 15.5 mm.; hind femora, ^, 

 9.4 mm., 9, 15.6 mm. 



Other species occur in Northern Mexico, which appear to bo 

 undescribed. 



4. A New Genus of Orphul^. 



Among the Orthoptera brought by Mr. Morse from the Pacific coast 

 is a new form of Orphula3 nearly allied to Chloealtis. Our genera of 

 Orphula3 may be thus separated. 



Table of the United States Genera of Orphidce. 



(ji. Antenna; relatively short, at most but little longer than head and pronotum 

 together ; scapular area of tegmina not specially dilated. 



^1. Foveola; of vertex more or less evident ; prozona not much longer than meta- 

 zona ; lateral lobes of pronotum transverse, that is, deeper than long; upper 

 ulnar vein of tegmina, at least in male, apically joining the lower ulnar vein at 

 a long distance beyond the end of the basodiscoidal field . . . Orphulella Stal. 

 Ifl. Foveolffi of vertex wanting ; prozona very much longer than metazona ; 

 lateral lobes of pronotum longitudinal, longer than or fully as long as deep ; 

 upper ulnar vein of tegmina, at least in male, apically strongly arched, joining 

 the lower ulnar vein not far beyond the end of the basodiscoidal field. 



c^. Lateral lobes of pronotum plane above, meeting the disk at nearly right 

 angles ; lateral carina parallel throughout ; tegmina usually much shorter 

 than the abdomen in both sexes Dichromorpha Morse. 



