196 



PSYCHE. 



[April 1898. 



sexes. Pronotum distinctly enlarging poste- 

 riorly (especially so in female) the disk 

 fuscous or testaceous flecked with fuscous ; 

 the posterior lobe darkest; the lateral lobes 

 with a post ocular piceous band on their 

 upper half which extends to the metazona, the 

 lower half testaceous ; lateral cariuae distinct 

 but not prominent; the median carina sharp 

 and distinct on the metazona, dull and indis- 

 tinct on the prozona ; front margin truncate, 

 hind margin subangulate. Tegmina a little 

 more than twice as long as pronotum, over- 

 lapping, sublanceolate, the dorsal and lateral 

 fields angularly separated, brownish, flecked 

 with fuscous, which along the median line of 

 the lateral field is more or less aggregated 

 into a row of small quadrangular spots. 

 Hind femora stout, testaceous, faintly bifas- 

 ciate with fuscous, the black of geniculation 

 bordered pro.ximally by a yellowish ring, the 

 inferior face a bright blood-red; hind tibiae 

 blood-red, tlie spines black except at base, 

 ten or eleven in the outer series. Extremity 

 of male abdomen strongly recurved, the sub- 

 genital plate terminating in a short conical 

 protuberance. ' Supra-anal plate triangular 

 with a narrow but deep median sulcus, which 

 broadens basally and lies between sharp 

 walls;, furcula consisting of a pair of short, 

 oblong, distant denticulations with rounded 

 apices, lying just outside of the walls of the 

 median sulcus; cerci tapering from a thick- 

 ened base to a slender, bluntly pointed apex, 

 the distal half slightly curved forward. 



Female, much more robust and darker 

 colored, the face, disk of pronotum, and 

 outer face of hind femora, a dark gray where 

 testaceous in the male ; the fuscous spots of 

 tegmina larger and more prominent. 



Average measurements : Length of body, 

 male, 30 mm., female, 28.5 mm.; antennae, 

 male or female, g mm. ; tegmina, male, 9.5 

 mm., female, 12.5 mm.; hind femora, male, 

 12.5 mm., female, 15 mm. Three males, 

 four females, La Salle Island, Michigan, 

 August 17, 1897. 



One hundred yards west of the hotel 



was a small clearing, an acre or more 

 in extent, wliere a cabin had formerly 

 stood. Along its margins and over 

 part of its area grew clumps of the 

 wild led raspberry {Rubzis strigosus 

 Michx.), and among the numerous re- 

 mains of stumps were small bunches of 

 wire grass and the trailing vines of the 

 dewbeiT}'. Here M. huroni had its 

 home, and the females, leaping lubber- 

 ly from one bunch of grass to another, 

 were readily secured, but the more 

 sprightly males would often have to be 

 chased quite a distance before their 

 capture was effected. Qiiite a number 

 of both sexes were taken, but unfortu- 

 nately the cyanide bottle was old and 

 failed to properly do its duty. When 

 the box in which thev were dumped 

 was opened it was found that the 

 majoritv of the females had " come to " 

 and had so chewed and broken their 

 dead companions, that only a few good 

 specimens were left. 



Melanoplus islandictis sp. nov. Below the 

 medium in size, the tegmina ovate and a 

 little shorter than the pronotum in both 

 sexes. Cerci of male short, styliform, taper- 

 ing gradually from a rather broa/i base; 

 furcula a pair of very short, triangular den- 

 ticulations. {^Piier series as limited by 

 Scudder.) 



Male, dark wood brown above; yellowish 

 below. Head not prominent; the face tes- 

 taceous, varying to clay-yellow; the vertex 

 but little elevated above the pronotum; eyes 

 of both sexes of medium size, equally promi- 

 nent; antennae uniform testaceous through- 

 out; about three fourths the length of hind 

 femora in both sexes. Pronotum expanding 

 posteriorly but little in male, noticeably so 

 in female, front margin truncate, hind margin 

 broadly rounded; lateral carinae indistinct 



