CH10MAEA.— THANAOS. 455 



3. Chiomara gesta. (Tab. xci. figg. 7, 8, 9 <$ .) 



Thanaos gesta, Herr.-Sch. Corr.-Blatt Regensb. xvii. p. 142 \ 



Thanaos invisus, Butl. & Druce, Cist. Ent. i. p. 114 2 ; P. Z. S. 1874, p. 369 \ 



Alis fuscis ; anticis ad basin obscure variegatis, squarais paucis albidis intermixtis, macula obliqua pallida ad 

 cellulae flnem, area discali linea lata tranversa squamis albidis composita, altera submarginali pallide 

 fusca : subtus fere omnino unicoloribus fuscis ; palpis subtus fuscis, griseo intermixtis. 



Hab. Mexico, Mazatlan, San Bias (G. Mathew), Jalisco (Schumann), Acapulco, Rio 

 Papagaio, Rincon, Hacienda de la Imagen, Acaguizotla, Tierra Colorada, Dos Arroyos, 

 all in Guerrero, Cuernavaca (H. H. Smith), Cordova (Rumeli), San Lorenzo near 

 Cordova (M. Trujillo), Rinconada, Coatepec (coll. Schaus), Atoyac, Teapa (H. II. 

 Smith), Valladolid in Yucatan (Gaumer) ; Guatemala, Volcan de Santa Maria (W. B. 

 Richardson), San Geronimo (F. I). G. & 0. S., Champion), Paniraa (Champion) ; 

 Honduras (Dyson, Wittkugel) ; Nicaragua, Matagalpa (Richardson) ; Costa Rica (Fan 

 Patten 2 3 ), Cache, Irazu (Rogers) ; Panama, Bugaba (Champion). — South America, from 

 Colombia to South Brazil ; Cuba x ; Jamaica. 



A very common widely ranging species, found over the greater part of our country 

 and the tropical portion of the continent of South America. In altitude it reaches 

 from the sea-level to about 3000 or 4000 feet in the mountains of Mexico and 

 Guatemala. 



Herrich-Schaffer's description was taken from a Cuban specimen, and we have an 

 example from that island which does not differ materially from a large series from the 

 continent, amongst which are specimens named by M. Mabille and Dr. Staudinger, no 

 doubt from the type. Thanaos invisus, Butl. and Druce, was based upon a Costa Rica 

 insect which is before us and agrees with the rest of our series. 



The male genitalia have a tegumen ending in two divergent depressed points, and 

 from the base two more hooks arise one on either side ; the scaphium is well developed 

 and granular; the harpes are divided into three lobes, the lower straight and elongated, 

 the middle one much shorter and slightly turned downwards, the upper erect and 

 rounded and bearing a number of stiff spines. (See Tab. XCI. fig. 9.) 



THANAOS. 



Thanaos, Boisduval, Icon. Hist, des Lep. p. 240 (1832) ; Scudder, Butt. N. Engl. ii. p. 1445 ; 

 Wats. P. Z. S. 1893, p. 69. 



A complete monograph of this genus is much needed, as until such a work has 

 been elaborated it is scarcely possible to give a satisfactory account of a few species 

 such as occur within our region chiefly along its northern border. 



In 1870 Mr. S. H. Scudder and Mr. E. Burgess wrote a paper " On Asymmetry in 

 the Appendages of Hexapod Insects, especially as illustrated in the Lepidopterous 

 Genus Nisovwdes" fProc. Bost. Poc. N H. xiii. pp. 282-306), in which a number of 



