THANAOS. 457 



Mr. Strecker sent us some time ago two named specimens of T. funeralis from 

 Texas, which agree very well with a long series of insects in our collection from 

 Mexico, and we have recently received from Mr. Scudder a typical example of the 

 same species for examination; with these we also associate some examples from 

 Guatemala. T. funeralis appears to be rather larger than its other Central- American 

 allies : the primaries are pointed, and it has the snow-white fringe of the secondaries 

 extending to the apex ; the costal fold in the male is strong. The insect is peculiarly 

 sombre in appearance, being of a nearly uniform fuscous colour : it has a pale patch 

 on the primaries beyond the cell, which is more apparent in the female ; this character 

 is not so marked in other members of the genus. 



We have made several dissections of the male genitalia and find our specimens agree 

 with Scudder and Burgess's figures of T. funeralis. 



The tegumen has two short hooks curved downwards at the points: the left harpe 

 is long and slightly sinuous, and the projection on its upper edge varies somewhat in 

 form. (See Tab. XCI. fig. 12.) 



2. Thanaos tristis, (Tab. XCI. fig. 15 s .) 



Thanaos tristis, Boisd. Ann. Soc. Ent. Fr. 1852, p. 311 \ 



Nisoniades tristis, Scudder & Burgess, Pr. Bost. Soc. N. H. xiii. p. 303, fig. 15 2 ; Liutner, 



Thirtieth Rep. State Mus. N. Y. p. 174 3 . 

 T. funerali quoad colores similis, structura maris partium genitalium tantum distinguendus. 



Hab. North America, California 1 2 3 . — Mexico, Durango city {Becker). 



We refer a single female from Durango somewhat doubtfully to this species. It 

 agrees exactly with other specimens of the same sex from California in our collection. 

 T. tristis is very like T. funeralis, but has less pointed primaries, and the male genitalia 

 are differently formed, as may be seen by a comparison of our figures (see Tab. XCI. 

 fig. 15). As we do not possess a male of T. tristis from our region we have figured a 

 Californian example. 



3. Thanaos msestus, sp. n. (Tab. xci. fig. 18 s .) 



T. funerali quoad colores similis, structura maris partium genitalium tantum distinguendus. 



Hab. North America, Arizona. — Mexico, Pinal, Puebla (F. D. G. & H. J. Elwes). 



The seven specimens we possess of this species from Puebla we had at first referred 

 to T. tristis, Boisduval, but on dissecting two males we found the genitalia so different 

 from those of that insect as figured by Scudder and Burgess, and also from those of a 

 Californian specimen of our own, that we are compelled to separate it. With these 

 we also associate three males received from Fort Grant, Arizona, from Morrison, one 

 of which we have dissected. 



The tegumen terminates in two short hooks : the right harpe has its distal portion 

 biol. centr.-amer., Rhopal., Vol. II., June 1899. 3 n 



