356 STUDIES IN THE ISCHNOPTERITES (oRTHOPTERA) 



margin moderately narrow, slightly broader than in Ischnoptera, 

 the width greatest a little distad of the mesal point. Mediastine 

 vein extending slightly more than half the distance to the apex 

 of the wing, from which vein spring a nmnber of the costal veins, 

 none of these latter enlarged. Discoidal vein dividing mesad, 

 the two portions equally decided and showing only inconspicu- 

 ous distal furcations; a number of weak, well spaced, nearly per- 

 pendicular veinlets connect this vein with the median vein. Ulnar 

 vein weakly curved, with few (1 to 3) incomplete proximal rami 

 and more (4 to 5) distal rami extending to the margin of the 

 wing. Intercalated triangle small. Median segment of males 

 specialized.^^ When other specialization of the dorsal abdominal 

 segments occurs in males, this is confined to the sixth and eighth 

 segments; no appendages occur as in Ischnoptera. Male sub- 

 genital plate asymmetrical with variously highly specialized styles. 

 Cephalic femora with ventro-cephalic margins armed with rather 

 heavy elongate spines, which decrease' gradually in length meso- 

 distad and are terminated distad by three longer (in increasing 

 ratio) distal spines. Other ventral margins of femora furnished 

 with not numerous heavy elongate spines. Median and caudal 

 femora, in addition, supplied with a single elongate, heavy 

 genicular spine. Small arolia are present. 



All of the species of this genus known to us are pale in general 

 coloration — buffy, in some species moderately to strongly tinged 

 with ochraceous. Distinctive characters of coloration are en- 

 tirely lacking in nearly all of the forms. 



With the exception of the anomalous S. lita, which is here 

 described from Key West, Florida, and San Jose del Cabo, Lower 

 California, the species of the genus are confined to the Bahamas, 

 the Greater Antilles and the islands adjacent. 



The Lita Group 



This Group includes but a single species, known from southern 

 Florida and San Jose del Cabo, Lower California. The sexes 

 are very dissimilar, the females having the eyes very widely 

 separated, the tegmina decidedly reduced, subquadrate, and the 

 wings vestigial. The males show the normal tegminal and wing 

 development and venation for the genus, but have the median 



'1 Except in S. lita. 



