234 Lr. A. S. Packard, Jun., on Insects 



respiratoiy tubes are covered witli very miimte fine stiff hairs ; 

 and there is a row of them on tlie front edge of the prothoracic 

 rings. On the front edge and on the sternal side of the meso- 

 thoracic ring is a dark, cliitinons*, transversely oblong area, 

 with four clear pale dots, arranged in a transverse row, the 

 space in front being broken up into chitinous spots ; in 

 other specimens this band is much narrower and less distinct. 

 The integument on the tergal side of the body is a little thick- 

 ened and chitinous. There are eight (Loew mentions only 

 seven in E. salinaria) pairs of large, abdominal, fleshy non- 

 articulated legs, like the abdominal fleshy legs of lepidopterous 

 larvae, ending in two curvilinear rows of well-curved dark- 

 brown hooks, five or six in a row ; on the tenninal pair of 

 feet are four rows, those of the fourth row being minute. 

 The respiratory tube arises suddenly from the end of the ter- 

 minal segment, stretching straight out posteriorly. The main 

 portion of the tube is rather thick, and about as long as the 

 body is thick ; it is of the same thickness throughout ; the 

 terminal branches are about one half as long as the main por- 

 tion ; they also arise suddenly, like the joints of a telescope, 

 not by the subdivision of the stalk, but by the sudden pro- 

 longation of the tracheffi witli their smTounding membranes, 

 and end in a minute nipple-like conical tip, separated by a 

 deep suture from the end of the tube. These respiratory tubes 

 vary in length in alcoholic specimens, as they are undoubtedly 

 more or less retractile. Length, including tube, '50 inch ; 

 length of tube '15 inch. 



The puparium differs from that of E. lialopMJa^ Pack., from 

 the Illinois salt-works, in being about a third larger, and in 

 having a large rounded tubercle on the side of the ninth and 

 tenth segments, and sometimes a third situated higher up on 

 the ninth ring. The seventh pair of feet are as large as the 

 sixth, being large and quite long, while in E. halojjMla they 

 are scarcely larger than the five basal pairs. While in E. halo- 

 liliila the respiratory tube is not half as long as the body, in 

 the present species it is fully half as long. As in that species, 

 they are attached to stalks of grass by curving the anal feet 

 around them. Length '55 inch; length of tube '21 inch. 



The pupa is white, naked, with the vertex of the head high 



clearly defined in alcoholic specimens. I cannot discover the spigot-like 

 stigmata on the prothorax described by Loew, 



* By the term " chitinous " is meant any honey-yellow portion of the 

 integument hardened by the deposition of chitine. This term may be 

 used to designate this honey-yellow colour, instead of the very vague 

 word ''testaceous." 



