MORGAN HEBARD 377 



Xestoblatta festae (Griffiui) (Plate XIX, figs. 8, 9, 10 and 11.) 



1896. Elpilarnpra] festae (iriffini, Boll. I\Iu.s. Zool. Anat. comp. Univ. 



Torino, xi, No. 236, p. 2. [fl 9], Punta de Sabana, Darien.] 



1898. I[sclinoptera] festae Giglio-To.s, ibid., xiii, Xo. 311, p. 3. (Same 



material.) 



The present species is closely related to the two which follow 

 in the genus, hamata and sancta. This we are able to determine 

 for hamata, from the male specimen of festae now before us. 

 Compared with Giglio-Tos' description of hamata very close 

 relationship is found, but in that species the male abdomen appar- 

 ently shows some differences of structure, while the females ap- 

 parently differ in having tegmina and wings as long as in the 

 male, and the supra-anal plate with a medio-distal incision. Com- 

 pared with the description of sancta the same differences for the 

 female appear to occur, in that species a feature of different wing 

 coloration also being remarked. 



Compared with the male of X. carrikeri that sex of the present 

 species is found to be very distinct; the females are less easily 

 separated, though the present species is less robust, more reddish 

 in general coloration, with latero-caudal angles of dorsal abdom- 

 inal segments, particularly of the sixth, more produced, and 

 longer cerci. In both sexes of the present insect the wings are 

 less deep, and the cephalic markings, though of the same gen- 

 eral character, show a distinctive difference, the chestnut brown 

 of the vertex not extending below the dorsal margins of the 

 ocelli; the ventral surface of the abdomen is pale in both sexes, 

 suffused with darker brown distad. 



As the male of this species is undescribed we here give the fol- 

 lowing characters. 



Description of Male. — (Rio Machuca. Costa Rica.) Size large, form robust. 

 Interocular space about one and one-fourth millimeters wide, siiglitly narrower 

 than interocellar space. Ocellar area weakly defined and interocular space 

 as pale as ocelli. Pronotum weakly convex to narrow lateral portions, which 

 are rather strongly but evenly deflexed.''" Tegmina and wings with veins 

 more pronounced than in carrikeri and wings less deep, with intercalated 

 triangle narrower."'" Median segment with low lateral ridges which, converging, 

 meet meso-cephalad and are supplied on their inner faces wath minute hairs, 



^" The general pronotal form is the same for all the species of the genus, as 

 given in the generic description. 



*^ The ulnar vein has 5 incomplete and 5 complete rami. 



TRAXS. A^r. ENT. SOC, XLII. 



