146 PROCEEDINGS OF THE ACADEMY OF [Maj^, 



from it. In all of the specimens the head, the two distal joints of 

 the palpi, the extremities of the femora and tibiae and the tarsi are 

 black or blackish. In no case is the usual dark transverse arcuate 

 bar of the pronotal disk strongly marked. 



The only previous records of the species are from Bahia (Bur- 

 meister), Para (Rehn) and Porto Velho, Rio Madeira, interior 

 Brazil (Rehn). 



Pseudomops affinis (Burmeister). 



1838. Th[yrsocera] affinis Burmeister, Handb. der Entom., II, abth. II, 

 pt. 1, p. 499. [Surinam.] 



Igarape-assii. Two females. December, 1911 (one). [One; 

 Cornell University.] 



Para and Surinam are the only localities from which the species 

 was i^reviously known. 



Pseudomops angusta Walker. 



1868. Pseudomops angusta Walker, Catal. Blatt. Brit. Mus., p. 81. [San- 

 tarem, Brazil.] 



Igarape-assii. One female. 



As in material already recorded by us,^ this specimen differs 

 from the original description in the palpi being entirely black, the 

 femora blackish dorsad and the cerci almost entirely black. 

 Ischnoptera crispula n. sp. (Pl. I, figs. 1-4.) 



A species showing certain affinities with the inca group on one hand 

 and with the tnarginata, castanea-rubiginosa group on the other. 

 It is- apparently allied to I. hebes Walker,^ from Santarem, Brazil, 

 agreeing in the general form, the small size, the widely separated 

 eyes, the setose antennae, the thinly pilose pronotum and tegmina 

 and most of the color features, but differing in the limbs being in 

 large part fuscous instead of "pale testaceous," in the abdomen 

 having the fourth ventral segment uniformly dark with remainder 

 of the same surface of the abdomen, instead of ''tawny" as in hebes, 

 while the tegmina have the marginal field, and to a lesser degree the 

 costal margin of the tegmina, pale ochraceous and sharply contrasted 

 with the remainder of the tegmina. The genital features of the present 

 species are quite distinctive. We are able to give only color differences 

 to separate the species, as all the structural features mentioned by 

 Walker for hebes are shared by the present species, but our experience 

 with the species of this section of the genus indicates that beyond 

 certain permissible fluctuations color features are well fixed. An 



^ Trans. Amer. Entom. Soe., XLII, p. 224, (1916). 

 6 Catal. Blatt. Brit. Mus., p. 122, (1868). 



