SUBFAMILY III. LOCUSTIN^E. 445 



middle, narrowing apically. Cerci stout, heavy, incurved, narrowing to- 

 ward middle, then rapidly expanding and furcate, the upper lobe longer 

 and more equal than lower, well rounded apically; the lower one subtrian- 

 gular, bluntly pointed, turned but little downward (Pig. 148, c.) Length of 

 body, $, 31.5, $,39; of antenna-, <J , 16, $, 17.5; of tegmina, $, 19.5, $, 

 23; of hind femora, $, 18.5, 9, 22.5 mm. 



Known only from Florida. Scudder's types were taken at 

 Jacksonville. Other specimens in the Philadelphia collections 

 were taken at Pomona, Fla., Sept. 7. 



207a. MELAXOPLUS FUKCATUS PEGASUS Hebard, 1919a, 293. Swift Locust. 



"Closely related to M. furcatus. Differs in the more solid coloration, 

 in this respect closely resembling M. clypeatits, and in the form of the male 

 cerci, the branches of the forked distal portion being more elongate and 

 slender, and the ventral branch exceeding the dorsal branch in length. 

 General color varying from prout's brown dorsad and tawny olive laterad 

 to a maximum intensive condition in which the head and pronotum are 

 blackish chestnut brown with a comparatively broad blackish postocular 

 bar, while the lateral fields of the tegmina are darker than the pronotum. 

 Pale ventro-external bar of caudal femora much more sharply defined 

 than in ftircctits." (Hebard.) 



This is a form of fiircntux, bearing the same relation to it that 

 8i/iiiiiictriens does to ch/jicalus or that litriilits bears to Iceclcri, 

 the principal differences being those given in the key. It is the 

 If. fiirratns of R. & H. (1910, 244), nee. Scudder. the type series 

 being from Billy's Island, Okefenokee Swamp, Ga. There it was 

 found July 15 10, in ''thick, rich bnshy undergrowth surround- 

 ing wet depressions filled with swamp loving trees, these areas 

 scattered through the long-leaf pine woods. The males frequently 

 flew short distances in a direct plunging manner; the females 

 \vere less likely to fly and were more difficult to locate." 



The four forms, clu)H'<ttnx, xi/iiniictrictifi. fiifc<ititx and i>cf/(tsns, 

 are very closely related. All are so far known only from small 

 series taken at isolated stations in an area less than 200 miles 

 square in the States of Georgia and Florida. While the extremes 

 of these series appear at present sufficiently different to cause 

 them to have been described as distinct species, they will in time, 

 through more extensive collecting, probably be found to represent 

 varieties of the one species, <-l)/j>c(itns ; these varieties differing 

 somewhat in details of coloration, wing-length and form of male 

 cerci, all very plastic characters among the Melanopli. 



Series XVI. THE BIVITTATUS GROUP. 



Only one of the five species ascribed to this group by Scudder 

 is here recognized as occurring in our territory, the characters of 



