EDESSA. 97 
(Blancaneauz); Guatumata, Capetillo, Teleman, Panzos (Champion); NicaRraava, 
Chontales (coll. Dist.); Costa Rica (Van Patten); Panama (coll. Dist., Boucard).— 
Soura America®; ContomBia? 1°; Guiana, Demerara?’, Cayenne®’, Surinam !?°, 
Braziu27 1°, Pard 3, Bahia?; ARGENTINE RepusBLic!, Buenos Ayres !, Monte Video 1°: 
Most of the varietal forms of this species have been received from Central America. 
40. Edessa cornuta. (Tab. IX. fig. 22.) 
Edessa cornuta, Burm. Handb. ii. 1, p. 3856. 10°. 
Edessa corculum, Erichs. in Schomb. Reis. iii. p. 610’ ; Stal, En. Hem. ii. p. 58. 62° (excl. syn. 
Aceratodes sigillatus, Walk.) . 
Hab. Mextco1? (Mus. Berol.); Guatemaua, Zapote, San Gerénimo (Champion) ; 
Costa Rica (Van Patten), Rio Sucio (Rogers) ; Panama (coll. Dist.).—CoLomBIa, Bogota 
(coll. Dist.) ; Guiana ?, Demerara (coll. Dist.) ; Braziu*, Para!, Bahia ®. 
Stal? erroneously considered £. sigillatus, Walk., a synonym of this species. A 
Mexican specimen thus labelled, received from the Stockholm Museum, is here figured. 
I cannot agree with Stal in following Erichson as regards the substitution of the name 
corculum for cornuta. Itis quite clear that Klug first proposed the name cornuta, 
and that it was by this author a MS. one only. Burmeister used Klug’s name, and 
gave a diagnosis, thus fixing the species, and hence the name also. Erichson appears 
merely to have substituted another MS. name; for in Schomb. Reis. iii. p. 610, the 
species appears as E. corculum, Hoffgg. (i. mus.)—E. cornuta, Burm., and E. albirenis, 
H.-S., being given as synonyms. But, as Graf von Hoffmansegg, so far as I can discover, 
never published a description, the name Z. cornuta, Burm., though inapplicable to the 
structure of the insect, must stand ; and as it was published in 1836, the species described 
by Dallas under the same name in 1851 must change also. For this I propose the 
name /. dallast. | 
41. Edessa cordifera. (Tab. IX. fig. 23.) 
Aceratodes cordifer, Walk. Cat. Het. iii. p. 452. 5°. 
Edessa albicors, Stal, En. Hem. ii. p. 58. 63°. 
Hab. Mexico ?, Oaxaca ! (coll. Dist.). 
A Mexican specimen in the Stockholm Museum is here figured. Stal substituted the 
name albicors for this species without any explanation. It is probable that he did so 
owing to the name cordigera having been used by Erichson. However, the names 
though similar are not identical, and I do not consider any rules have been formulated 
to allow such a change to be made on such grounds. Moreover, no writer appears 
conversant with Erichson’s species ; and should it be proved ultimately to be a synonym 
only, then Walker's title would have to be resuscitated. 
BIOL. CENT.-AMER., Rhynch., February 1881. 13 
