MORGAN HEBARD 89 



Parcoblatta zebra^^- new species (Plate III, figures 10 to 14.) 

 iScrv Isdnwptera iihlcriumi Saussure and Zehntner, (not of Saussurc. 1862), Biol. 

 Cent.-Amer., Orth., i. p. 3^^- i^- Georgia; Texas, and New Mexico: (in 



part).]!-^ 

 1893. hchnoptcm iihlcri Saussure and Zehntner, ibid., pi. Ill, figs. 21 and 22. 



(Lapsus calami. i-») (In part.) [Figures of female described on page 36.] 

 1910. Ischnoptera divisa Rehn and Hebard, (not of Saussure and Zehntner, 1893), 



Proc. Acad. Nat. Sci. Phila., 1910, p. 430- (In part.) [ 9 . Rives. Tennessee.] 



Males of this species are distinctive in the specialization of the 

 median segment, which is supplied mesad with a broad, heavy 

 tuft of agglutinated hairs, directed cephalad, with segment fur- 

 nished with a low transverse ridge toward the cephalic margin, 

 which ridge is furnished, cephalad of the heavy hair tuft, with a 

 fringe of hairs directed caudad, these briefly overlapping the hairs 

 of the tuft. In the position of this organ, the species agrees alone 

 with P. americana, but decidedly greater specialization than m 

 that species is shown. The tegminal discoidal sectors show 

 scarcely any radiation, all being feebly oblique, nearly longitudinal. 



The pale dorsal coloration, with dark transverse bands on the 

 abdomen, readily distinguishes females showing this, the normal, 

 condition from those of any other species of the genus. Saussure 

 and Zehntner's excellent figures in the Biologia represent a female, 

 showing a less intensive coloration, but in other respects in every 

 way typical. Females of less decided coloration might alone be 

 confused with those of P. divisa, but, over the area of coincident 

 distribution, females of that species have the head normally de- 

 cidedly more flattened. 



The general appearance of the insect suggests a small and rather 

 pale member of the complex to which we assign divisa and P. pcn- 

 sylvanica. The male abdominal characters, however, clearh' dem- 

 onstrate that it is a distinctive form, agreeing in a few features 

 with americana and P. notha, but widely separated from both. 



1" In allusion to the distinctive female coloration. 



'28 Both the latter localities may apply to the present insect, though unknown to us 

 from west of central Texas. Both the description and plate give no indication of the 

 locality from which the specimen figured came. See page 114, footnote 175. 



129 Explained in list of plates, p. VII, (1900). The type for this name is selected in the 

 present paper as the figured male, pi. Ill, fig. 23; tJt/cn consequently falling in the synon- 

 ymy under P. fnhescens. 



MEM. AM. ENT. SOC. 2. 



