TURESIS.— MEGALEAS. 617 



Brazil respectively, which have been identified by Dr. Butler as Hesperia lucas, Fabr., 

 and we have seen seven others, including both sexes, six of these being from Chiriqui. 

 T. lucasi is not unlike Papilio salius, Cram. Dr. Staudinger has sent us examples of 

 it under the names of Carystus hebon, Mab., and Goniloba complana, H.-S., but it does 

 not agree with the description of either of these insects. 



2. Turesis theste, sp. n. (Tab. CIV. figg. 24, 25, 26, c? .) 



Alia fuscis, anticis maculis duabus inter ramos medianos, proxima multo majore, altera magna et geminata in 

 eellula, una quoque parva subapicali, flavo-hyalinis : subtus ut supra, sed alis pallidioribus et rubescenti- 

 oribus, posticis macula minuta ultra cellulam flava ; palpis, corpore subtus et oculorum ambitu oehraceis. 

 $ ignota. 



Hab. Costa Eica, Cache (Rogers). 



A single male example sent us by Mr. Eogers from Costa Eica is all we know of 

 this species. It is a close ally of T. lucasi, but differs from it in the absence of the 

 streak on the submedian nervure of the primaries, both above and beneath, and there 

 is only a single subapical spot on these wings ; the secondaries, too, are immaculate 

 above. For the genitalia of the male, see Tab. CIV. fig. 26. 



MEGALEAS, gen. nov. 



The single species we refer to this genus, Hesperia syrna, G. & S., from Costa Eica, 

 is a very large and robust insect allied to Thracides, from which it differs in having a 

 stouter crook to the antennas, the primaries less pointed at the apex, the secondaries 

 more rounded at the anal angle, and the brand in the male more oblique. 



The antennae are half the length of the costa, and have an elongate, gradually 

 thickened club, terminating in a long, stout crook. The palpi have the third joint 

 very short and concealed. The primaries are moderately elongate, and blunt at the 

 tip ; the cell is much less than two-thirds the length of the costa ; the discocellulars 

 are strongly oblique, the upper one three times the length of the lower, the latter 

 about half the length of the third median segment ; the lower radial is very much 

 depressed at the base ; the first branch arises a little before the middle of the median 

 nervure, the second considerably before the lower angle of the cell. The secondaries 

 are rounded at the anal angle ; the lower discocellular is distinct, the upper one faint. 

 The body is very robust. The hind tibiae have two pairs of spurs. The primaries in 

 the male have a linear, very oblique, interrupted brand extending from near the end 

 of the second median segment to before the middle of the submedian nervure. 



1. Megaleas syrna. (Tab. CIV. figg. 27, 28, * .) 



Hesperia syrna, Godm. & Salv. P. Z. S. 1879, p. 155 \ 



Alis fuscis, stigmate pallidiore, anticis plaga magna partem distalem cellulse occupante, altera obliqua a vena 

 submediana ad cellulae finem extendente, ramis medianis divisa, et inargine interno, infra ramum medianum 



