238 Mr. H. Druce on new Species of Lepidoptera. 



froHi the costal to the inner margin. The head and thorax 

 greenish yellow ; the sides of the head and the tegulse rich 

 madder-brown 5 on each side of the base of the thorax is a tuft 

 of black hairs tipped with bluish white ; the upper surface 

 of the abdomen yellowish brown, with six narrow yellow lines 

 extending from the base to the anus ; the underside of the 

 abdomen pale yellow ; antennae and legs dark brownish 

 black. Expanse 6^ inches. 



Hob. Nicaragua, Chontales [Belt, Mus. Oxford) ; Panama, 

 Volcan de Chiriqui {Trotsch, Mus. Staudinger). 



I have much pleasure in naming this grand insect after 

 Dr. Staudinger, to whom I am much indebted for his kindness 

 in submitting all his Central-American Heterocera to me for 

 examination. This species is most nearly allied to Amphonyx 

 Tivularis of Butler, which was originally described from the 

 Amazons, but is also found in Central America. A. Stau- 

 dingeri differs from all the described species of Amphonyx 

 by the entire absence of the yellow spots on the sides 

 of the abdomen. 



Our description is taken from Dr. Staudinger's specimen. 



ISOGNATHUS, Feld. 



Isognathus yucatana, sp. n. 



Primaries pale grey, thickly irrorated with dark brown 

 scales, and very indistinctly banded with a waved brown line, 

 which crosses the wing from the costal to the inner margin ; 

 a zigzag black line crosses from the costal margin beyond the 

 middle nearest the apex to the middle of the inner margin, 

 where it joins a black streak from the base, and a marginal 

 row of black spots extends from the apex to the anal angle : 

 secondaries reddish, broadly bordered with brownish black 

 from the apex almost to the anal angle, where it is greyish. 

 Underside of all the wings reddish brown, palest near the 

 base. Head, thorax, and abdomen brownish greyj the 

 abdomen with two central narrow brown lines extending from 

 the base to the anus ; the underside of the thorax and abdo- 

 men paler than above; antennae and legs greyish brown. 

 Expanse 3^ inches. 



Bab. Mexico, Yucatan (Mus. Staudinger). 



This species- resembles Dilojthonota ello in colour, but 

 is at once distinguished from it by its different form and 

 the entire absence of the black band on the abdomen. 



