600 FAMILY VII. TETTIGOXIID^E. THE KATYDIDS. 



shorter lateral lobes which have an appreciable indentation at the sinus, 

 more acute angles of the disto-dorsal abdominal segment; less exserted and 

 shorter cerci and subfissate subgenital plate of male, the more robust 

 limbs and the greatly elongate medio-internal distal spur of the caudal 

 tibiae." In addition A. calcaratus has the black stripe on sides of pronotum 

 wider, more shining and extending back along sides of abdomen, the yel- 

 low one below it wider, more prominent; outer face of hind femora darker. 

 Tegmina extending 2 3 mm. beyond pronotum, their dorsal field black. 

 Prosternal spines often represented by small conical teeth. Ovipositor 

 feebly upcurved beyond the middle, its apex median. Length of body, $ , 

 22.5 24.4, 9, 28; of pronotum, $ and 9, 1011; of tegmina, $, 3.6 

 5.2; of hind femora, $, 23.9 24.8, 9, 26.5; of ovipositor, 17 mm. Great- 

 est width of pronotum, 3.8 4 mm. 



Known only from a series in the Philadelphia collections tak- 

 en at Billy's Island, Ga., and a single male in the Morse collec- 

 tion from Hastings, Fla. 



II. IDIONOTUS Scudder, 1894a, 179. (Gr., "peculiar" + "back/ 1 ) 



Medium sized species having the vertex more than one-half as 

 broad as interocnlar space; pronotnm not greatly produced back- 

 ward, its disk flat and with a submedian U-shaped transverse sul- 

 cus; lateral carinse sharp, strongly converging near apical third 

 of pronotum to narrow its disk to nearly one-half the caudal 

 width ; median carina present behind the transverse sulcus ; front 

 tibise armed above on outer margin with three spines ; hind 

 femora more than twice the length of prouotum, unarmed be- 

 neath ; tegmina overlapping, as long as or longer than prouotum, 

 male, one-half its length, female, their tips broadly rounded. 

 Other characters as given in key. 



284. IDIONOTUS SPHAGNORUM (F. Walker), 1869, 258. 



Pale reddish-brown; lateral lobes of pronotum blackish-fuscous, the 

 front and lower margins and basal third pale yellow; sides of abdomen 

 with a row of black spots; outer face of hind femora with fuscous striae; 

 hind tarsi and sides of vertex black in female. Pronotum narrow, its hind 

 margin broadly rounded, male, subtruncate, female. Tegmina dimorphic 

 in male, in the macropterous form surpassing tips of hind femora. Male 

 with cerci cone-shaped, armed within near base with a sharp black curved 

 spine, this invisible from without : supra-anal plate broad, deeply and nar- 

 rowly notched, the lobes each side squarely truncate; subgenital plate 

 scoop-shaped, with a deep, broad, triangular apical notch; styles subcylin- 

 drical, movable, twice as long as broad. Ovipositor as long as hind femora, 

 strongly upcurved. Other characters as given above. Length of body, $ , 

 1720, 9, 24.5; of pronotum, $ and 9, 5.25.5; of tegmina, $ , 6, 9, 2.5; 

 of hind femora, $ , 12, 9, 14.5; of ovipositor, 11 14 mm. Width of pro- 

 notum, 9, front margin, 2.7; hind margin, 3.7 mm. (Fig. 199.) 



