MORGAN HEBARD 343 



surface of abdomen dark chestnut brown. Tegmina shining 

 deep chestnut brown with an auburn tinge, becoming slightly paler 

 distad; marginal field in male briefly Inifiy distad; area of dextral 

 tegmen concealed when at rest, hyaline with a weak brownish 

 suffusion, in male with veins hyaline, in females with veins em- 

 browned, oblique channel of dextral tegmen with structural color 

 brilliantly metallic blue and green. ^ Wings hyaline, very faintly 

 tinged with brown; entire area of costal veins brilliant deep chest- 

 nut brown with an auburn tinge, other veins deep chestnut brown. 



The Guiana specimen differs from the typical series in having 

 the marginal field of the tegmina more extensively buffy and the 

 limbs diiitinctly paler, ochraceous tawny. 



Specimens Examined: 8; (probably) 2 males and f) females. 



Caparo, Trinidad, VI, 1912, (S. M. Klages), 1 cf , •) 9 , typcy allotype, paratypes, 

 [A. N. S. P.] 



Chenapowu to Saweritik, British Guiana, VIII. 21, 1911, (Cratnpton and 

 Lutz), 1 cf?,9 [A. M. N. H.|. 



The Rufa Group 

 Very close to the Morio Group. The species of the present 

 group differ in being not as large, more reddish in general col- 

 oration and particularly in having the male supra-anal plate 

 showing only a limited subchitinous area meso-distad. 



Ischnoptera angustifrons new si)ecieH (Plate XVII, fig. 7 ) 



The female of this species is unknown. The male may be 

 separated from this sex of /. vulpina by the distinctly narrower 

 interocular space, more transverse pronotum with discal sulci 

 less decided, less decidedly ferruginous general coloration, pro- 

 portionately shorter organs of flight and dift'erent proportions of 

 subgenital plate. 



These two species show near relationship to I. rufa rufa, which 

 form, however, has the interocular space decidedly wider, the 

 organs of flight in proportion decidedly shorter and the mesal 

 production of the male subgenital plate much more conspicuous, 

 with styles decidedly more widely separated. 



Type. — cf ; Rio Pacaya, Peru. July, 1912. [Acad. Nat. Sci. 

 Phila., Type no. 5307.] 



** This is conspicuous only in a bright light. 

 ^ The abdomen is missing in this specimen. 



TRANS. AM. ENT. SOC, XLII. 



