184 PROCEEDINGS OF THE ACADEMY OF [May, 



Igarape-assu. January 17 and February 1, 1912. Three males, 

 six females. 



These specimens have been compared with a typical pair, a female 

 from Asuncion, Paraguay and a male from San Bernardino, Para- 

 guay, loaned by Prof. Bruner, from which they show no important 

 differences, although they are rather different in coloration. The 

 Para female has the base color pale ochraceous, with no distinct 

 markings on the body, and the external face of the caudal femora 

 unmarked. The male from the same locality has a decidedly varied 

 pattern of the usual contrasted type of the genus, and a distinct 

 oblique dark bar on the external face of the caudal femora, which 

 marking extends to the base as a fine line. The Igarape-assu males 

 are duller and darker than the Para male, but are much more varie- 

 gated than the females. The external femoral bars are present 

 in all of these, continued to the base by a fine line in one. The 

 Igarape-assii females are very dark and dull, very little contrasted 

 and with the pale paired thoracic lines completely or nearly com- 

 pletely effaced. The color wash of the proximal portion of the wings 

 in all the specimens, as in the tjT^ical material, is more bottle green 

 than "blue" as originally described. The same is true of material 

 from other localities in Paraguay and southern Brazil. The ventro- 

 external face of the caudal femora is variable in the extent to which 

 it is suffused with fuscous or blackish. It is always touched with 

 darker in the punctations of the distal two-thirds of the area, which 

 tendency becomes more pronounced and extensive until in the 

 extreme condition that section is almost uniformly colored, but it 

 is never as sharply defined laterad, as solid, or as solid to the base 

 of the femur as in nebulosa, chapadensis, dilecta and obliqua. This 

 feature is the one referred to by us as showing variability in the 

 coloration of this margin.^- 



Osmilia flavo-lineata (DeGeer). 



1773. Acrydium, flavo-linealum DeGeer, Mem. Hist. Ins., Ill, p. 497, pi. 42, 

 fig. 4. [Surinam.] 



Igarape-assu. January 17, 1912 (one). Thirteen males, twelve 

 females, one juv. male, one juv. female. 



These specimens have the disk of the vnng more bluish green than 

 in typical individuals of flavo-lineata, in which the same area is 

 yellowish, although with a green tinge, the present specimens being 



32Proc. Acad. Nat. Sci. Phila., 1907, p. 186, (1907). Tlie material there re- 

 corded as signatipes, as we have shown elsewhere (Trans. Amer. Entom. Soc, 

 XLII, p. 294, (1916)) belongs to cceruleipennis and chapadensis. 



