274 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



armed, though one or two minute spines may be discerned dorad 

 near their apices. Armament of hmbs as characteristic of genus. 

 Pulvilli, tarsal claws and arolia as described for icano on page 276. 



Head auburn, shading ventrad to buffy, ocelli light buff. Ant- 

 ennae buffy proximad, shading rapidly to dresden brown. Palpi 

 warm buff, with distal joint slightly darkened. Pronotum och- 

 raceous-buff, weakly translucent cephalad and laterad, disk very 

 faintl}^ tinged with ochraceous -tawny except latero-caudad, where 

 this becomes slightly heavier. Tegmina strongly translucent, 

 ochraceous-buff, very faintly tinged with ochraceous-tawny, except 

 in marginal field; veins not darkened. Wings transparent, even 

 more weakly tinged with the same coloration, area of costal veins 

 not darkened. Dorsal surface of abdomen buffy proximad, marbled 

 with cinnamon-brown meso-distad, solidly cinnamon-brown distad. 

 Cerci cinnamon-brown, becoming slightly paler distad. Limbs 

 ochraceous-buff, the spines ochraceous-tawny. Ventral surface 

 of abdomen cinnamon-brown. 



The Paraguayan male is slightly darker, the pronotal suffusion 

 slightly heavier and the proximal portions of the tegmina more 

 strongly tinged with ochraceous-tawny. 



Length of bodyi°° 9.3-9.5, length of pronotum 2.4-2.4, width of 

 pronotum 3-3.1, length of tegmen 9-9.2, width of tegmen 2.9-3 mm. 



In addition to the type, a paratypic male from Sapucay, Paraguay, 

 collected in October, by W. T. Foster and belonging to the United 

 States National Museum, has been studied. i"! 



Ischnoptera saussurei'" new species. Plate XI, figures 9 and 10. 



It is certain that Saussure's Blatta fusca, described in 1869,^°^ 

 represents this or a closely related species. That name is preoccup- 

 ied by Blatta fusca Thunberg, 1784. As a result we here describe 

 saussurei in full, the insect requiring a new name if not actually re- 

 presenting a new species. ^"^ The importance of the male genitalic 

 development was not recognized at the time Saussure described 

 fusca and it will, as a result, be necessary to examine the type be- 

 fore that name can be definitely placed. 



The present species agrees closely with I. icano here described on 



1°" The measurements of the type are given first. 



"1 This specimen was recorded as Blattella germanica by Caudell, Jour. N. Y. 

 Ent. Soc. XII, p. 183. (1904). 



^"•2 In honor of that ilhistrious Orthopterist, Henri de Saussure. 



"'Rev. et Mag. de ZooL, (2) ,XXI, p. 110. Described from Argentina, later 

 given as Corrientes, Argentina. 



"^ Rehn suggested that fusca might prove to be a synonym of /. marginata 

 (Brunner) before the now large series of this section of the genus in the unstudied 

 collections had been assembled. At that time it was supposed that the number 

 of species, included in this section of the genus Ischnoptera, was much smaller 

 than we now know to exist. Proc. Acad. Nat. Sci. Phila., 1915, p. 272, footnote 4. 



