448 PROCEEDINGS OF THE NATIONAL MUSEUM. voi..xxiii. 



According to Coquillett this species occurs in destructive numbers 

 in the Joiiquin Valley. In 1885 he estimated that it was one-twentieth 

 {IS al)undant as the Devastating Locust (JfelwK^jdH.s dera^sfator). Early 

 in June the species was most abundant in grain fields, but after har- 

 vest it did considerable injury to grapevines and low trees. They do 

 not migrate in swarms, but apparently (juite independent of each other 

 Hy with or against the wind at will. They occasionally make the 

 crackling sound while flying which is espin-ially "haracteristic of 

 C'lrcotettii:. When at rest they seem to prefer the bare ground, but 

 seek the shade in the hottest part of the day. They readily eat dry 

 leaves and the bodies of their dead companions. The eggs are laid in 

 bar(> fields. Mi'. Coquillett has given the name of Yellow Locust to 

 this species, which appears to be very suitable. 



TRIMEROTROPIS LAUTA Scudder. 

 Trhncroiriipis hnila ScroDEK, Ent. Notes, V, 187.5-7H, p. 26. 



Small or medium, brown much varied with fuscous maculations, 

 occasionally plainer, except the tegmina, which are always distinctly 

 maculate. Scutellum of the vertex very deeply sulcate, with the 

 median carina faint, but continued upon the occiput, nearly twice as 

 long as broad; eyes a little longer (male) or a little shorter (female) 

 than the genal groove. Pronotum with the disk flat and the lateral 

 carinas barely apparent on the front of the metazone and prozone; 

 median carina less prominent on the prozone than in Tronerot/'ojji-s 

 psendofasciata and scarcely cristate, with the anterior lobe of the crest 

 of the prozone plainly longer than the posterior lol)e; metazone nearly 

 twice as long as the prozone, with the disk smooth with a few scat- 

 tered larger granulations; metazonal process acute, rectangular, or 

 obtuse in the same sex, with the sides straight and the apex barel}^ 

 rounded. Tegmina thickly maculate with annular spots, which exhibit 

 only a trace of the usual arrangement into three bands; area of the 

 cubital forks occupied by a single row of cells in the male, in the 

 female by about two rows at least proximal ly. Wings narrow, but not 

 quite twice as long as broad, hyaline even on the disk, and without a 

 trace of the usual fuscous band e\'en in the veins. Posterior femora 

 distinctly banded on the outer face. Posterior tibia? as in the pre- 

 vceding species, with the markings more distinct. 



Length, male, 19 mm,, female, "Mh, mm.; length of tegmina, male, 

 18 mm., female, 25 mm.; length of posterior femora, male, 9 mm., 

 female, 12 mm. 



Hahifat. — Low^er California, Guadalupe Island, Seudder. I have 

 one of Dr. Scudder's types and a junnber of specimens from Guada- 

 lupe Island in the museum of Stanford University. 



This species is doubtless restricted to Guadalupe Island, and while 

 very closely reUited to the preceding species, it is probably distinct. 



