80 THE BLATTIDAE OF PANAMA 



In addition to the type and allotype the following series of 

 paratypes is before us. 



Gatun, Canal Zone, Panama, VII, 12 to 15, 1916, (Harrower), i c?. 



Rio Trinidad, Pan., Ill, 7 to VI, 4, 191 1 and 1912, (Busck), 7 c?. 



Empire, C. Z., Pan., XI, 14, 1913, (Hebard; under rubbish on edge of jungle), 

 I cf, I juv. 9 in instar preceding maturity. 



Paraiso, C. Z., Pan., IV, 24, 191 1, (Busck), 2cf. 



Old Panama, Pan., XI, 13, 1913, (Hebard; under drift on edge of coral sand 



beach), 26", i 9. 



Panama City, Pan., XI, 1913, (Zetek), i 9, [United States National Museum]. 

 Chorrera, Pan., V, 17, 1912, (Busck), i 9. 



Xestoblatta festae (Griffini) 



1896. E[pihwipra] festae Griffini, Boll. Mus. Zool. Anat. comp. Univ. Torino, xi, 



no. 236, p. 2. [[ 9 ], Punta de Sabana, Darien.] 



1916. Xestoblatta festae Hebard, Trans. Am. Ent. Soc, xlii, p. 377, pi. xix, figs. 8 



to II. [Detailed discussion of both sexes.] 



Porto Bello, Panama, IV, 20, 1912, (Busck), i 9. 



Gatun, Canal Zone, Pan., VII, 19 to 22, 1916, (Harrower), i 9. 



Xestoblatta immaculata new species (Plate IV, figure 16.) 



This, one of the finest species of the Group Ischnopterites, is 

 readily distinguished from any of the described forms of the present 

 genus by its larger size, immaculate and paler coloration and form 

 of interocular space. The male genitalia will probably be found to 

 be very distinctive. 



In linear arrangement we would place this species after the highly 

 colored X. nyctiboroides (Rehn) and before X. carrikeri Hebard. 

 It appears to represent a distinctive type, as does nyctihoroides. 

 The decided width of the interocular space and proportions of 

 the joints of the maxillary palpi show nearer agreement with 



carrikeri. 



Type.— 9 ; Alhajuela, Panama. March 10, 1912. (A. Busck.) 

 [United States National Museum.] 



Size very large and form broad for the Group. Head with interocular space very 

 broad; narrower ventrad (dorsad 1.8, ventrad i.i millimeters), due to the internal 

 margins of the eyes being moderately convergent, not subparallcl as in the other 

 known species of the genus; least interocular width equal to that between the ocelli, 

 little less than that between the antennal sockets, these proportions much as in the 

 female sex of carrikeri. Ocellar spots distinct, not well developed as in Ischnoptera, 

 ocellar area weakly defined. Pronotum as characteristic of the genus, evenly and 



