160 GENUS CARIBLATTA (oRTHOPTERA) 



clothed with minute chitinous spines directed inward ; ^' between 

 these specialized styles the median portion, slightly less than a 

 third of the distal margin, is straight or weakly produced. ^"^ 



9 . Agrees with the male except in the following features. 

 Form very slightly less slender. Supra-anal plate very small, 

 strongly transverse, weakly produced with distal margin broadly 

 convex but showing a short though marked median concavity. 

 Subgenital plate large, scoop-shaped, distal margin proximo- 

 laterad distinctly convex, then weakly and broadly concave at 

 base of cercus, thence weakly convex to the rather decidedly 

 produced apex, the margin of which is broadly rounded but the 

 plate at this point slightly pinched. 



Measurements {in millimeters) 



•w a 



o S 



fciS o o*= 'o-'^ OH "Si:^ 



c: £ USTZ Mg ^9 MM «5MI 



Cayamas, Cuba (4) 6.6-7.8 1.7-1.9 2.4-2.5 7.4-8.6 2.1-2.4 



San Francisco Mts., 



San Domingo (6) 7-7.8 1.8-2 2.6-2.7 8-8.9 2.3-2.6 



Rio Piedras, Porto Rico (1) 7 1.8 2.4 ■ 7.4 2 



Mayaguez, Porto Rico (2) 7.6-8.1 2-2.1 2.7-2.8 7.2-8.9 2.3-2.7 



Stony Hill, Jamaica. .. (1) 7.3 1.9 2.4 8 2.3 



Montego Bay, Jamaica (6) 7.4-7.6 1.8-1.9 2.3-2.4 7.2-7.4 2.1-2.2 



'^ A single male in this series, typical in other respects, has a large proportion 

 of these spines apparently fused into one much longer and stouter spine. 

 This condition may indicate the manner in which the extraordinary sinistral 

 style in C. insularis has been evolved. 



^^ In the series from San Domingo this is perfectly transverse; those from 

 Hayti and Cuba have it more or less asymmetrical and weakly produced to 

 varying degrees; in those from Jamaica it is more produced, constituting a 

 brief truncate lobe, while in the males from Porto Rico, those from Mayaguez, 

 Ad juntas and Coamo have a minute median production longer than wide, the 

 one from Mayaguez has the median space narrower but the production larger, 

 while those from Manati and Rio Piedras have the median portion of the plate 

 very unusually asymmetrical, large and decidedly projecting, terminating in an 

 acute dextral apex. From this evidence it is clear that frequently variation in 

 this feature occurs in the present species, apparently partially geographic in 

 character but showing much too great instabiUty to afford grounds for nominal 

 recognition of any sort. 



