128 THE BLATTIDAE OF PANAMA 



Group. i'^^ It is closely related to C. pellucida Saussure,i^-^ agreeing 

 closely in size, form and general coloration, but differs in the follow- 

 ingrespects: head with occiputdark,interocular-ocellar area whitish, 

 with a pair of approximate dark brown dots and a smaller pair of 

 more widely separated dots; pronotum with two short, longitudi- 

 nally parallel, pale lines; much less transverse male supra-anal plate, 

 and male subgenital plate with styles and intervening process 

 distinctive. 



Close relationship to C. lata Rehn, recently described from Pari, 

 Brazil, is also shown. Comparison with the type of that species 

 shows close agreement in size, form, general coloration and pro- 

 notal marking, that insect differing, how^ever, in the following 

 features: head immaculate'^'^'' with two widely separated dark dots 

 In the interocular-ocellar area; narrower pellucid border of teg- 

 mina; male subgenital plate with styles less elongate, broader and 

 more truncate distad, the interval between their bases showing no 

 mesal production whatever, but only two minutely microscopic 

 decurved teeth. 



In C. tessellata Rehn, from Ceara Mirim, Brazil, in addition to 

 the distinctive coloration, we would note that the styles are of the 

 type found in pellucida, but that the minute triangular production 

 between their bases, though similar in form, is in tessellata sur- 

 mounted by a single minute, but heavy, decurved tooth. 



'^ This group includes a number of relatively large, broad species, all of \\hich show 

 marked specialization of the area between the stylqs of the male subgenital plate. In 

 the collections at hand the following species belong to this group; lata Rehn, panamae 

 here described, pellucida Saussure and tessellata Rehn. The two latter species show 

 greater specialization of the male styles, these having their apices inwardly produced and 

 overlapping, while the shafts of the styles arc parallel in normal position and do not 

 diverge. 



Specimens at hand, recorded by Rehn as C. minula Saussure and C. prrhicida (Walker), 

 represent a closely alUed group, agreeing in general size and form, but having the greatest 

 male genitalic specialization on the internal margin of the sinistral style, near its base, 

 and showing no specialization of the median area between the bases of the styles. 



'•''^ Saussurc's original description of pellucida, from a Mexican female, is excellently 

 supplemented by his later treatment of the species, from both sexes, taken near Moyoa- 

 pan, Mexico (Hist. Nat. Mex., Rech. Zool., vi, p. 92, pi. ii, figs. 49 and 49a, (1870)). His 

 color figure is excellent, except that the general coloration should apparently ha\e a de- 

 cidedly more orange tinge. Our comparisons here are supplemented by examination 

 of a male of pellucida from San Rafael, Vera Cruz, Mexico, in the Hebard Collection. 



1*8 The type, however, has the head decidedly discolored. The species may be foimd 

 to have the interocular-ocellar area pale, as in panamae. 



