Lawson: Genus Acinopterus. 121 



white, with indistinct smoky clouds on the discs of some of the apical and 

 anteapical areoles. Veins white, claval suture brownish. Face and legs tinged 

 with greenish, some of the white tibial spines brown tipped. Tarsal joints at 

 apico;* dark. Dorsal abdominal segments, fexcept lateral and apical margins, 

 blackish. 



Described from a single male taken at San Augustine (Ckll. 2140). In form 

 this insect very closely resembles P. superbus and in structure is strictly con- 

 generic with it. It differs very widely, however (and this is a generic differ- 

 ence according to Van Duzee's sj'noptic table of the genera), in that it does not 

 possess the elytral reticulations or other markings so characteristic of the 

 genus. On a very superficial examination it might be taken for a Chlorotettix, 

 but its general form, stronger build, and lengthened vertex are strictly Phlep- 

 siid. 



The writer gives the following description: 



A rather slender and light-colored species which sometimes may be rather 

 dark. Length, 5 to 6.5 mm. 



Form. Head distinctly narrower than the pronotum. Vertex varying in 

 length, but usually about twice as wide as long and half longer at the middle 

 than next the eye; disc sloping and with the impressed line behind the apex. 

 Face as in the other members of the genus. Pronotum over twice as wide 

 as long, the anterior margin more strongly curved than the posterior, the 

 lateral and humeral margins about equal. Scutellum of average size, finely 

 granulated, and with distinct transverse impressed line. Tegmina long and 

 narrow, sutural margin extending straight clear to tip, forming an acute 

 apex; venation usually distinct, though sometimes rather weak, with from one 

 to several cross-veins between the first and second anal veins. 



Color. Yellowish or yellowish grey. Pronotum with five pale and some- 

 times indistinct lines. The tegmina vary considerably, being sometimes 

 almost colorless till near the tip, while in others the veins are margined lightly 

 with brown, especially at the margins, but in all cases some of the apical cells 

 are more or less darkened. The darkened tips of the veins along the sutural 

 and costal margins sometimes give the elytra a variegated appearance. Be- 

 neath this species is usually light except for the darkened doreum of the 

 abdomen. 



External genitalia. Female: Last ventral segment over twice as long as the 

 preceding, posterior margin di.stinctly but roundingly produced medially, but 

 with the small median notch characteristic of the genus. Pygofers moderately 

 wide, sparsely spined, and slightly exceeded by the ovipositor. Male: Last 

 ventral segment longer than the preceding, hiding the valve. Plates long and 

 fingerlike, about the length of the last ventral segment, shghtly narrowed to 

 the somewhat diverging but rounded tips. Pj'gofers bearing a few stout spines 

 and exceeding the plates by about two-thirds the length of the latter. 



Internal male genitalia. Styles wide basally and with strong process to con- 

 nective; apically strongly curv^ed and clublike, the apical portion of the club 

 with distinct and large granulations, giving it a rough appearance. Connective 

 heart-shaped, the excision wide and shallow, the apex rounded, ffidagus rather 

 small but stout, the upper part much like an inverted boot, the heel distinctly 

 cleft ; the paired basal processes about half the length of the apical process, 

 their lower edges serrate; the terminal process stout, the penis opening at the 

 fimbriate tip. 



