NO. 1124. HEvisKtx OF riiE MKLAStU'Li—sri inn:n. 227 



50. MELANOPLUS DAWSONI. 

 (Plates I. lijLi:. tt\ XV. fijr. 5.) 



I'czotiUix (lawsoni 8( iddkk!, Daws. IJep. (Jeol. Wee. 4!>tli Par. ( 1«75), p. .343; IJntt. 



Ortb. N. A. Hound. Coiiiiu. (187r>), j). 3; Can. Kiit.. XII (1880), p. 75.— Cait- 



ilEl.M, IJcp. Eut. Soc. Out., XVIII (188»J), p. 71: Can. h'ec. Sc, II (ISX7), 



p. 101 ; Can. <>rth. (IXXl). p. 13. 

 VrzohUlr IcIliislriH S( ri»i>KK !, Ann. Kep. Chief Eng., 187t) (1H70). ]». '}{rj; Aim. 



Rep. (Jeogr. Surv. 100th .Mer., 1876 ( ls7t>), p. 282; Can. Ent., XII (1880), j.. 



7."». — Hui NKH, l.'('i). U. S. Eut. Connn., Ill, (1883), ]>. ,'>9. 

 rrzoleUix alxlilum I)oi>(;kI, Can, Ent., IX (1877), p. 113. — ScfDDEi: !, Can. Ent., 



XII (1X80), p. 7.').— HiMNKU. Publ. Nel.r. Aoad. Sr., Ill (18i»3), p. 27. 

 Melaitnplus abdititm Osiioux, rroc. Iowa Acad. Sc, I, Pt. 11 (181J2), p. lis. 



Obscure fusco testaceous. Head slijjlitly ])roininent in the male 

 ^»nly, olivaceo testaceous, iiit'u.scated abovo, witli a broad i>iceous, ])ost- 

 ocular band: vertex tumid, distinctly elevated above the i)ron«)tum, 

 the iutersi)ace between the eyes rather broad, at least twice as broad 

 as the tiist antennal joint; fastigiiim steei>ly declivent, ])lane, the lateral 

 margins feebly and broadly eh'vated; frontal costa broad, subequal. as 

 broad as the interspace between the eyes, fading out before reaching 

 the clypcus, above ])lane (male) or feebly convex (female), at and 

 below the ocellus slightly sulcate, everywhere punctate, with a tend- 

 ency above to a biseriate arrangement; eyes not very large, not 

 ])roniincnt, scarcely longer than the infraocular portion of the genae; 

 antennae ferruginous, four-tifths (male) or three tiftbs (female) as long 

 as the hind femora. Pronotum subequal (male) or distinctly compressed 

 above anteriorly (feniale), short, the disk transversely a little convex 

 and passing into the vertical lateral lobes by a rounded angle, whicli 

 is nevertheless so abrupt as to form, at least in the male, tolerably- dis- 

 tinct lateral carinae; lateral lobes lighter colored below than the disk, 

 above on the prozona a broad, lustrous, dark colored band, sonu times 

 obsolete, sometimes deepening to piceous; median carina sligiit, i)er- 

 current, ecpial, but blunter on the prozona than on the metazoua; front 

 margin feebly convex, with a slight mesial emargination not always 

 distinct, hind margin obtusangulate eijually in macropterous and 

 brachyj»terous forms; prozona distinctly longitudinal (male) or (juad- 

 rate or sub^juadrate (female) a third to a fourth longer than the more 

 closely punctate metazona. Prosternal spine very short and blunt, 

 rather stout, somewhat transverse; inters])ace between meso.^ternal 

 lobes half as long again as broad (male) or a little transverse (female). 

 Tegmina brownish fuscous, more or less feebly flecked with fuscous 

 and either greatly surpassing the hind femora, moderately broad and 

 subequal nearly to the well rounded tip (il/. d. completus, Plate I, fig. «), 

 or ovate-lanceolate, apically subacuniinate, a little longer than the 

 l)ronotum only (.1/. d. fcUiistris); wings when fully developed ample, 

 hyaline, with pale brownish fuscous veins, i)p^er and sometimes wholly 

 pallid in the anal area. Fore femora of male very feebly enlarged; 



