NO. 1124. REVISION OF THE MELANOPL1 SC UDDER. 199 



north, and Los Angeles County, in the south. The typical forms are 

 very dark, having tegmina surpassing but little the hind femora, with 

 meager maculation of the discoidal area, rarely at all cinereous in the 

 basal half ; the hind tibiae are variable in color. 



A second form, which appears to be the widest spread, occurring in 

 nearly every county in which the species has been found, from Shasta 

 to San Diego and from Marin to Sierra, is of a decidedly cinereous 

 aspect, with abundant and generally rather confused maculation in the 

 discoidal area of the tegmina, which usually much surpass the hind 

 femora; the hind tibiae are variable, but rarely glaucous. This form 

 best represents the original types of the species when first described, 

 and being also the most common may bear the name M. d. typicalis 

 (Plate XIII, fig. 5). It is of medium size. 



The third form is also of medium size and is very closely related to 

 the last, and often hardly distinguishable. It may be called -If. rf. 

 affinis 1 (Plate XIII, fig. 6). It differs principally by its shorter teg- 

 mina, which rarely surpass the hind femora, and which are very sharply 

 maculate, with well-defined spots, and the hind tibiae are usually glau- 

 cous, occasionally luteous. I have seen specimens from Sierra, Sacra- 

 mento, and Los Angeles counties. 



The fourth form is by far the largest and the most heavily marked of 

 all, besides being of a rather light tint, in which the dark maculations 

 appear with the greater distinctness, and it may accordingly be known 

 as M. d. conspicum (Plate XIII, fig. 7). It appears much like an exag- 

 gerated form of the last-mentioned type, and has a more prominent 

 head, much longer tegmina, which well surpass the hind femora, and 

 ample wings, so that I suspect the migrating flights will be found to be 

 composed mainly or exclusively of this form ; the pronotum is unusually 

 clear of lateral markings, and the hind tibiae are pale glaucous. It has 

 not been found south of the center of the State (nor have any migratory 

 hordes been reported there), and indeed only in the central portions 

 and the elevated districts, namely, in Sacramento, Eldorado, Ainador, 

 and Merced counties. 



33. MELANOPLUS VIRGATUS, new species. 

 (Plate XIII, fig. 8.) 



Melanoplm devastator SCUDDER! (pars), Proc. Bost. Soc. Nat. Hist., XIX (1878), 



pp. 285-286, 287-288 ; (pars), Entom. Notes, VI (1878), pp. 46-47, 48-49. 

 Pezotettix virgatus McNEiLLl, MS. . 



Light testaceo-fuscous, more or less ferruginous above. Head mod- 

 erately large and rather prominent luteo-testaceous, clouded with 

 fuscous, above much infuscated, especially along the middle line pos- 

 teriorly, and with a postocular piceous band sharply delimited below 



1 The form supposed by Coquillett (see synonymy) to be Bruner's M. affinis is not 

 this, but M. d. typicalis. 



