PIERELLA. 205 



I. HETVERA GROUP. 



These are broad-winged Butterflies, peculiar to Tropical 

 America, and measuring from two to three inches across the 

 wings. The genera Cithcerias, Hiibner, and Hetccra, Fabricius, 

 include the only transparent-winged species among the Saty- 

 rince; the hind-wings are usually marked with one or two ocelli, 

 and bordered, either with a festooned brown band, or with rose- 

 colour or purple. The other genera, Pierella and Antirrhcea, 

 Htibner, are opaque, and sometimes sub-caudate ; in Antirrhcea 

 there are usually rather large sub-marginal spots or eyes. As 

 an example of this group we have figured a species of the 



GENUS PIERELLA. 

 Hcetera, sect. 2, Pierella, Westwood, Gen. Diurn. Lepid., p. 



365 (1851). 



Pierella, Butler, Ent. M. Mag., iv., p. 195 (1868); Schatz and 

 Rober, Exot. Schmett, ii., p. 198 (1889). 



The type is Papilio nereis, Drury, 111. Exot. Ent., iii., pi. 35, 

 fig- 2 > 3 ( T 7 82 )- It is a thinly-scaled brown Butterfly, two and 

 a half inches in expanse, with the outer half of the hind-wings 

 tawny, marked with two eyes, and bordered within with a 

 white band, much expanded in the middle ; on the fore-wings 

 is a much narrower oblique band. It is common in South 

 America. 



Pierella is the most extensive genus of the exclusively 

 Tropical- American group to which the transparent-winged 

 genera, Cithcerias and Het&ra belong. 



The species of Pierella measure from two to three inches 

 across the wings, which are broad and rounded, opaque, 

 though sometimes rather thinly scaled, and the hind-wings 

 are nearly as broad as long, more or less quadrate, usually 

 .with a slight projection on the hind-margin opposite to the 

 anal angle. The wings are brown, sometimes with a slight 



