690 REPORT UNITED STATES GEOLOGICAL SURVEY. 



exactly with Dr. Scudder's description of pellucida than with that of 

 atrox, with the exception given." 



I am inclined, from the reasons above given, to regard atrox as a 

 synon^'m of pell iicida, and that its range agrees in the main with that of 

 (E. Carolina, which is fonnd on the Pacific coast (Vancouver's Island), 

 according to Walker, and probably Thomas. 



Mr. Henry Edwards, of San Francisco, kindly furnishes the following 

 notes : 



" This species is very abundant in the spring and early summer, but 

 at present appears to be somewhat limited in its range as far as Cali- 

 fornia is concerned. It is found only in our foothills, and has not, to my 

 knowledge at least, been regarded as a very destructive insect. I never 

 saw it but once in very large swarms, and it then appeared to attach 

 itself more to the pasture grasses than to any growing crops, although 

 there were plenty of fields of barley, oats, &c., in the neighborhood. It 

 ap[)ears in its larval condition in April, and in the winged state in May, 

 passing entirely out of existence by the middle of June. I have taken 

 it sparingly in Nevada and in Vancouver Island, and have seen some 

 specimens from Santa liosa Island, but I am pretty sure that it cannot 

 be called a common insect in those localities." 



DescrlpUon of the adult. — Head uniform, pale brownish-yellow ; the raised edge of 

 the vertex dotted with fuscous ; a dark fuscous spot behind the eye, broadening poste- 

 riorly, but not extending upon the pronotuni. AntenntB as long as the head and pro- 

 uotum together, dull honey-yellow, growing dusky toward the tip. Pronotuni dark 

 brownish-yellow, the sides darker anteriorly; median carina extending the whole 

 length of the pronotum, moderately raised, cut once by a transverse line a little in 

 advance of the middle ; lateral carlnte prominent, extending across the anterior two- 

 thirds of the pronotum ; anterior border of the pronotum smooth, very slightly angu- 

 lated ; posterior border delicately marginate, bent at a very little more than a right 

 angle, the apex rounded ; tegmina dull-yellowish on the basal half, with distinct 

 fuscous spots ; toward the apex obscurely fuscous, with indistinct fuscous markings ; 

 humeral ridge yellowish, and, when the tegmina are in repose, inclosing a brownish 

 fuscous triangular stripe ; the spots are scattered mostly in the median held, consist- 

 ing in the basal two-hfths of the tegmina of small roundish spots, and one larger 

 longitudinal spot in the middle of the basal half; there is a large irregular spot in the 

 middle of the tegmina, knd beyond a smaller transverse spot, followed by indistinct 

 markings ; wings hyaiine, slightly fuliginous at the extreme tip ; the veins, especially 

 in the apical half, fuscous ; legs uniform brownish fuscous ; apical half of spines of 

 hind tibite black. 



Length of body, 0.9 inch ; of tegmina, 0.9 inch; of body and tegmina, 1.125 inches; 

 of pronotum, 0.2 inch ; of hind femora, 0.5 inch. 



It bears a strong resemblance to (Edipoda pellndcla, Scudd., common in Northern New 

 England. — (Scudder in Hayden's Geological Report on Nebraska, 1672, p. 250.) 



The American Locust, Acrydium aviericanum Drury (Plate L!^IV, Fig. 6.) 

 'This is one of our largest grasshoppers, being a little over two inches 

 in length. It is occasionally very destructive to vegetation in the 

 Southern States. According to Professor Thomas it occurs in North 

 Carolina, Southern States, Florida, Alabama, Texas (Scudder) ; Illinois, 

 Tennessee, JMississippi, District of Columbia (Thomas) ; Virginia, New 

 York (?Drury). I have observed it very abundantly in Virginia, at Dan- 

 ville, in April and early in May. The figure (after Eiley) is so good 

 that further description is unnecessary. 



In the pupa state this species is occasionally destructive. I have re- 

 ceived from Prof. D. S. Jordan specimens which I regard as the pupae 

 of this species, with the following notes on its habits: 



" While seining in Eome, Ga., in the Etowah Ri\er, I noticed, about 

 July 25, a fence covered completely with large grasshoppers not fully 

 fledged and extremely brilliant in color. They were very hyaline and of 

 all shades from a clear pea-green to pale clear yellow and a sort of clear 

 reddish amber (scarcely any two the same; all become pale yellow in 



