with marginal carinae evident but often very faint. Male with hind leg knees black (except in Psoloessa)              ........................................... 33 3 la. Hind tibiae orange to red ... Heliaula rufa (Scudder) RLJFOUS GRASSHOPPER. Color plate 3. 3 lb. Hind fibiae white, grayish, or blue ... Cibolacris                 ................. 32 32a. Tegn@dna and body marked with large and small spots and maculafions. Dorsum of hind femora marked with a dis- tinct dark band at narrowest point. CiraveUy and sandy desert areas ... C parviceps (Walker). Color plate 3. 32b.Tegniina and body marked with small dark and light granular specks. No dark band on bind femora as above. Sand dune areas ... C. samalayucae Tinkhain, Color plate 3. 33a. Hind fibiae blue. Lateral foveolae triangular. Anten- nae black ... Aulocara          ............................................ 34 33b.Hind tibiae not blue. Lateral foveolae quadrangular. Antennae brownish to orange              .................................. 35 34a. Inner spurs of hind tibiae strongly unequal (Fig. 100). Tegniina usually shorter than abdomen. Female with subgenitm plate strongly bisinuate apicany. Male with dark nwkings on pronotum and femora dull brownish or grayish ... A. fenw- ratum (Scudder) WHITE CROSS GRASSHOP- PER. Color plate 2. 34b.Inner spurs of hind tibiae subequal (Fig. 101). Tegniina usually exceeding abdomen. Female with subgeniw plate weakly bisinuate apically. Male with black markings. Often with light stripe down teginina ... A. elliotti (Thomas) ELLIOTT GRASSHOPPER. Color plate 2. 35a. Lateral foveolae obsolete, smooth. Large species, typically 30-50 mm. Tegmina ex- ceeded by abdomen. Male usually (not al- ways) black. Female usually green or brown, sometimes entirely black ... Boopedon nubi- lum (Say) BLACK-MALES GRASSIFOP- PER. Color plate 2. 35b.Lateral foveolae distinct. Smaller species, mostly 10-25 mm. Never entirely black.. 36 36a. Hind tibiae with 12 or more spines in outer row. Found in lush grasses and sedges of moist places in mountains ... Chorthippus curtipennis (Harris) MARSH NIEADOW GRASSHOPPER