360 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



North Carolina (Rehn and Hebard); Clayton, Rabun County 

 and Lost Mountain, Georgia (Rehn and Hebard). 8 



The following features are shared by delaware and its nearest 

 allies. Pronotum with a fine percurrent medio-longitudinal 

 carina. Tegmina pad-like, rounded, separated by a slight to 

 decided interval, conspicuously shorter than the pronotum. 

 Male subgenital plate with a small but decided blunt subapical 

 tubercle, the dorsal surface of which is darkened. Limbs showing 

 no trace of green. 



These species may be distinguished as follows: 



A. Male furcula very small, scarcely longer than proximal width. 



Penis with four large erect lamellate plates cephalad and 

 curling cephalad like flower petals, yoke of shaft slightly 

 produced and bluntly rounded dorso-caudad, leaving a 

 meso-caudal interspace (PI. XXIII, fig. 8). (Female 

 normal. Vertex less projecting. Pronotal lateral lobes 

 and ovipositor jaws less deep. Broad postocular dark 

 bar sharply outlined on pronotal lateral lobes. The insect 

 appears adult earlier than tribulus in the regions where the 

 distribution of the two coincide.) Extreme southern New 

 York and northern New Jersey to mountains of extreme 



northeastern Georgia delaware new species 



AA. Male furcula small, but considerably longer than proximal 

 width (PI. XXIII, figs. 2 and 3). Penis lacking large 

 lamellate plates. 



B. Penis with four small lamellate plates directed cephalad at 



apex, yoke of shaft with caudal margins rounding broadly 

 ventrad, leaving a meso-caudal interspace (PI. XXIII, 

 fig. 9). Female as in delaware but with pronotum deeper. 

 Mountains of northeastern Alabama . . . tribuloides Morse 

 BB. Penis terminating in a flat knob, with four very small 

 projections caudad, yoke of shaft with caudal margins 

 attingent, produced dorsad as small rounded projections 

 (PI. XXIII, fig. 10). Female heavier with more projecting 

 vertex, pronotal lateral lobes and ovipositor jaws deeper 

 and broad postocular dark bar (usually) less sharply 

 outlined on pronotal lateral lobes. (Appears adult late 

 in season.) Collison Ridge in mountains of central- 



8 The records from Toccoa, Dalton, Jasper, Sharp Mountain, Buckhead 

 and near Stone Mountain were, however, correctly referred to tribulus. We 

 now realize that delaware extends its distribution into the lowlands only in 

 the northern portion of its distribution, while tribulus does this only in the 

 southern portion of its range. In addition the former species appears much 

 earlier in the season than the latter. 



