CHAP. XXI.] 



INSECTS. 



473 



Family 6.— ACR^ID.^. (1 Genus, 90 Species.) 



General Distribution. 



The genus Acrcca is especially abundant in the Ethiopian 

 region, which contains two-thirds of all the known species ; 3 or 

 4 species only, range over the whole Oriental, and most of the 

 Australian regions ; while all the rest inhabit the same districts 

 of the Neotropical region as the Brassolidffi. 



Family 7.— HELICONID^. (2 Genera, 114 Species.) 



Geneeai, Distribution. 



Keotropical 



Sitb-reoions. 



2.3.4 



Neabctic 

 Sub-regions. 



Pal.earctic 

 Sub-regions. 



3 - 



Ethiopian I Oriental 

 Sub-regions. Sub-keoions. 



Au.stralian 



Sub-regions. 



The true Heliconidas are very characteristic of the Neotroj)ical 

 region ; one species only extending into the Southern States of 

 North America as far as Florida. The genus Heliconms (83 

 sp.), has the range of the family ; while Eueidcs (19 sp.), is con- 

 fined to the Brazilian and Central American sub-regions. 



Family 8.— NYMPHALID^. (113 Genera, 1490 Species.) 



This is the largest and most universally distributed family of 

 butterflies, and is well illustrated by our common Fritillaries, 



