SYNCHLOE. | 177 
Synchloe saundersii, Doubl. & Hew. Gen. Diurn. Lep. p. 186, t. 24. f. 2°. 
Synchioe tellias, Bates, Ent. Monthl. Mag. i. p. 84*; iil. p. 157°. 
Synchloe quehtala, Reak. Pr. Ac. Phil. 1866, p. 248°. 
Synchloe ardema, Reak. Pr. Ac. Phil. 1866, p. 336’. 
Synchloe paupera, Feld. Reise d. Nov., Lep. p. 395°. 
Synchloe mediatrix, Feld. Reise d. Nov., Lep. p. 395°; Strecker, Butt. N. Am. p. 126”. 
Synchloe misera, R. Feld. Verh. z.-b. Ges. Wien, 1869, p. 471”. 
Synchloe pretona, Boisd. Lép. Guat. p. 87". 
Synchloe crocale, Edw. Trans. Am. Ent. Soc. v. p. 17°; Strecker, Butt. N. Am. p. 127". 
Chlosyne adjutrix, Scudd. Bull. Buff. Soe. ii. p. 269”. 
Synchloe adjutrix, Strecker, Butt. N. Am. p. 126”. 
Synchloe adelina, Staud. Verh. z.-b. Ges. Wien, 1875, p. 102”. 
Alis fusco-nigris ciliis albo intermixtis, anticis lineis duabus transversis bifractis punctorum alborum ornatis ; 
posticis area discali rufa et ad basin rufo variegatis: subtus anticis ut supra, costa ad basin rufa maculis 
alteris flavis submarginalibus notatis; posticis fascia lata flava transvittatis, extra eam serie punctorum 
ruforum deinde serie altera punctorum nigrorum albo pupillatorum maculisque sex submarginalibus flavis. 
notatis. 
Obs. Species valde mutabilis, interdum posticis fere omnino nigris (=S, adelina ”), interdum anticis fascia lata 
rufa et maculis rufis ornatis (=S. saundersi*® et S, adjutria). 
Hab. Nortu America, Arizona 13, Texas 5.—Mexico (Karwinski 1, Deppe), Vera Cruz 
(W. H. Edwards’), Orizaba (Sallé), Huahuapan (fedemann 10), Oaxaca (Lenochio) ; 
British Honpuras, Corosal (Roe); Goatematat !, Yzabal, Motagua valley, Duenas, 
Pacific coast (F. D. G. & O. S.), Polochie valley (Hague); Nicaraaua (Bridges), Chontales 
(Belt); Costa Rica (Carmiol, Van Patten *), San Francisco, Volcan de Irazu (Rogers) ; 
Panama, Volcan de Chiriqui (Ribde 16, Arcé), Calobre (Arcé), Lion Hill (M‘Leannan).— 
CoLtomBiA® 9; VENEZUELA?; Ecuador; Peru; Bo.ivia. 
The Mexican insect described by Geyer as S. lacinia1, and which is very nearly 
represented by figg. 6, 7 on our Plate, occupies an intermediate position between the 
extreme varieties of this species, which, on the one side, lose all their bright markings 
and become (as represented by figg. 16, 17) the Synchloe adelina of Staudinger !’; on 
the other hand, the amount of colour is increased to a considerable extent, till we have 
S. saundersi® (approximately represented by figg. 8, 9). Between these extremes every 
gradation of colour can be traced ; and all the rufous markings, as well as the yellow 
ones of the underside, can be exhibited in different individuals from their maximum 
development till they vanish altogether. 
Though in nearly every part of Central America each gradation is found, it is very 
evident that certain varieties preponderate in numbers in certain districts. Thus in 
Mexico the dark extreme (S. adelina) occurs with the true S. lacinia, and also inter- 
mediate forms; but the dark form, perhaps, slightly predominates. In Guatemala the 
S. lacinia pattern is by far the most abundant ; but this also passes by almost insensible 
steps (figg. 14, 15) into the dark extreme (figg. 16, 17). In Nicaragua the prevalent 
form approaches the S. saundersi type. In Costa Rica the S. adelina type is most 
BIOL. CENTR.-AMER., Rhopal., Vol. I., June 1882. 2A 
