Lawson: Genus Acinopterus. 125 



Holotype, female, and two paratypes, females, in collection of 

 Doctor Ball. 



One paratype, female, in the Snow collection, University of 

 Kansas. 



Remarks. This species stands between brunneus and viridis. 

 From the former it differs in its smaller size, lighter color, and 

 shorter female ventral segment, while from the latter it differs in 

 being lighter, and in not having the tegminal veins green. 



Acinopterus viridis Ball. 



(PI. VIII, fig. 11; pi. IX, fig. 6; pi. X, fig. 4; pi. XI, fig. 5; pi. XII, figs. 7, 8.) 



Acinopterus acuminatus var. viridis Ball, Can. Ent., xxxv, p. 231, 1903. 

 Acinopterus acuminatus var. viridis Van D., Cat. Hemip. N. A., p. 675, 1917. 

 Acinopterus acrimirtatus var. viridis Laws., Kan. Univ. Sci. Bui., xii, p. 208, 1920. 



The following is the original description: 



A. acuminatus, var. viridis, n. var. Form and structure of the preceding 

 nearly; slighth- smaller. Bright grass green both above and below. Eyes 

 and extreme tip of elytra fuscous. 



Described from a number of specimens from southern Colorado and Ari- 

 zona. This is the common form in southern Colorado, where it was taken by 

 E. P. Van Duzee and the author. 



The following description is by the writer : 



A rather robust greenish species, with or without elytral markings. Length, 

 5 to 6 mm. 



Form. Head distinctly narrower than the pronotum. Vertex about twice 

 as wide as long, one-half longer at the middle than next the eye, anterior 

 margin broadly rounded and with a depression just behind apex. Face with 

 all the sclerites broad. Pronotum over twice as wide as long, anterior margin 

 more strongly curved than the posterior, lateral and humeral margins about 

 equal, the disc transversely wrinkled. Scutellum as in other members of the 

 genus. Tegmina moderately long, the apex narrowed but rounded, with 

 usually one or two or sometimes several cross-veins between the first and 

 second anal veins and sometimes one or two between the second and third. 



Color. Vertex, pronotum and scutellum usuall}^ green, though sometimes 

 distinctly j'ellowish. Tegmina green with the nervures darker green, the 

 latter being sometimes not margined at all or bordered with brown till all 

 the apices of the veins at the sutural margin, along the distal half of the 

 costal margin, and at the apex, are definitely bordered, frequently giving the 

 apex a darker appearance. Below the insect is also green, the tarsi tending 

 to be brownish. 



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

 the preceding, the lateral and posterior margins rounding to the produced apex 

 which bears the usual small median notch. Pygofers stout, sparsely spined, 

 exceeded by the ovipositor. Male: Last ventral segment long, hiding the 

 valve. Plates long and slender, slightly longer than last ventral segment, the 

 bases distinctlj' wider than the divergent apices. Pygofers broad, sparsely 

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



Internal male genitalia. Stjdes large, widest at point of process to connec- 



