DISMOKPHIA. 175 



slightly longer ; the basal joint is unusually long. The harpagones of the male organs 

 terminate in a blunt densely chitinous lobe ; the tegumen has no central point, but 

 bifurcates, each fork ending in a strongly chitinous point, so that the extremities of 

 these organs show four strong points. 



The female of JD. praxinoe does not appear to possess any chitinous spiny patch, but 

 a small one is present in both D.fortunata and D. pallidula. We have already alluded 

 to the variation in the structure of the species we still retain in Dismorphia ; the seven 

 found in our region may be grouped as follows : — 



a. Upper discocellular of the primaries short. 



a'. Anal angle of primaries obsolete, outer margin concave. 



a". Second and third median segments subequal ... 1. praxinoe. 

 b". Second median segment shorter than the third ... 2. pallidula. 



3. medora. 

 V. Anal angle of primaries prominent, outer margin convex . 4. fortunata. 



5. ribbei. 



b. Upper discocellular of the primaries long 6. sororna: 



7. myris. 



Dismorphia, as here restricted, comprises a large portion of the species included in it 

 under its wider sense, and embraces all those that have the coloration of the Ithomiinse; 

 they are distributed over nearly the whole of tropical America, their metropolis being 

 the valley of the Amazons, where they were carefully studied by Mr. Bates, and formed 

 the chief examples brought forward in his paper on mimetic resemblances. 



1. Dismorphia praxinoe. 



Leptalis praxinoe, Doubl. Ann. & Mag. Nat, Hist. xiv. p. 419 1 ; Gen. Diurn. Lep. p. 36 2 . 

 Dismorphia amphione, Butler & Druce, P. Z. S. 1874, p. 362 3 . 

 Leptalis amphithea, Feld. Reise d. Nov., Lep. p. 144 ( $ ) \ 

 Dismorphia arsinoides, Staud. Ex. Schmett. p. 25, t. 15 s . 



d alis elongatis, anticis fusco-nigris, litura a basi vena mediana et ramo suo primo tripartita aurantio-rubra, 

 linea angustissima inter venam costalem et subcostalem ad cellulae finem haud exfcensa, altera breviore a 

 basi infra venam medianam coloris ejusdem, maculis tribus exterioribus, una vena subcostali partita, secunda 

 ultra venas discoidales, tertia subovali margini externo propiore et tribus subapicalibus flavis ; posticis 

 plaga permagna subovata costam aream distalem occupante cana sericeo-fusca marginata, litura infra 

 venam medianam venis quadripartita fulvo-aurantiaca infra earn nigro-fuscis ad angulum analem rufo- 

 brunneis : subtus anticis regione costali et apicali flavescenti-fuscis, maculis flavis sicut in pagina superiore, 

 plaga magna canescente aream mediam et posteriorem occupante et sericeo-fusco circumcincta ; posticis 

 rufo-fuscis, maculis variis praesertim in dimidio apicali flavidis. 



$ mari similis, sed anticis costa apicem versus valde arcuatis et bamatis, coloribus omnibus dilutioribus. 

 maculis flavis ad cellulae finem fulvo tinctis ; posticis f uscis litura mediana a basi fere ad apicem extensa 

 fulva, costa et margine externo ad angulum analem ferrugineis : subtus anticis fere ut supra sed dilu- 

 tioribus, posticis pallide ferrugineis flavo et fusco indistincte maculatis. 



Hab. Mexico (Salle*), Mazatlan (Forrer), Orizaba, Oaxaca (Fenochio), Cordova 



