N.. 11124. UElISIOy OF THE MELAXnPI.I—SCrDUEli. 375 



M. arboreuft; ])rozona quadrate (male) or distinctly transverse (female), 

 not more than a third (male) or scarcely (female) longer than the 

 metazoua, the feebly tumid disk passin^r insensibly without lateral 

 carinae into the lateral lobes, though these are sometimes visible in the 

 posterior section as on the metazoua ; median carina occasionally distinct 

 throughout, but always feebler and sometimes very feeble on theprozona; 

 metazona closely ruguloso-punctate. Prosternal spine short, conical, 

 erect ; interval between mesosternal lobes subquadrate ( male) or distinctly 

 transverse, but narrower than the lobes themselves (female). Te^'-mina 

 somewhat surpassing the hind femora, very gradually tapering to a 

 well-rounded apex, fusco testaceous, sprinkled with moderately large 

 roundish or quadrate fuscous spots; wings pellucid, with a feeble 

 gretnish-yellow tinge, feebly iijfumated apically where the veins and 

 cross veins are blackish fuscous. Fore and middle femora luteo- or 

 olivaceo-testaceous heavily flecked with black, showing a tendency to 

 form a triple belting; hind femora similar, the black forming mod- 

 erately narrow basal, premedian, postraedian, and aiucal belts, which 

 do no not touch the coralline under and inner surfaces, except the hitter 

 in a partial way; hind tibiae dull red, with a jwstbasal obscure tiavous 

 annulus, before which they are sometimes blackened, and beyond which, 

 above and on the sides, often flecked or suffused with plumbeo-fuscous, 

 the serial space between the spines often dull luteous, the whole pilose; 

 spines black nearly or quite to their base, except on the inner side, ten 

 to twelve in number in the outer series, none arising very near the base of 

 the tibiae. Extremity of the male abdomen scarcely clavate, somewhat 

 upturned, the supraanal plate triangular, with convex lateral margins 

 and subrectangulate apex, its median sulcus terminating abruptly in 

 the middle, rather broad, somewhat shallow, bounded by rather sharp 

 walls; furcula entirely wanting; cerci large, broad, the basal half or 

 less subequal, exteriorly convex ana puu'^tate, beyond abruptly expand- 

 ing to nearly double the widtli in exactly opposite directions, consider- 

 ably more above than below, but otherwise symmetrical, the apical 

 margin augulato-convex, the whole gently incurved; infracercal plates 

 surpassing the sides of the supraanal plate only at the extreme base 

 and slightly; subgenital plate moderately broad, apically abrui>tly 

 elevated to a considerable degree and thickened, but only a little 

 prolonged. 



Length of body, male, 21 mm., female, 28 mm.; antennae, male, 

 14.5 mm., female, 12 mm.; tegniiua, male, 17 mm., female, 18..j mm.; 

 hind femora, male, 10.5 mm., female, 12 mm. 



Nineteen males, 34 females. Maine, Packard, P. R. Uhler; North 

 Conway, Carroll County, New IIami)shire; Andover, Essex County, 

 Massachusetts, November; vicinity of Boston, Massachusetts, Uhler; 

 Cambridge, Middlesex County, Massachi seits, September (Museum 

 Comparative Zoology; S. H. Scudder); Waltham, Middlesex County, 

 Massachusetts, September 5, C. J. ^Faynard {A, P. Morse); Sherborn, 

 Middlesex County, Massachusetts, September, -^Irs. A. L. Babcock 



