606 EHOPALOCEEA. 



many of our specimens, including one from San Bias in Western Mexico, agree. 

 Most of our examples from Mexico, however, have the spots on the upperside of the 

 primaries less distinct or even absent, and the secondaries beneath much more obscurely 

 coloured. Our figure of the insect is taken from the San Bias specimen. For the 

 genitalia of the male, see Tab. CIII. fig. 37. 



MNESTHEUS, gen. nov. 



Amongst the small Tropical-American Pamphilina? with a long, erect, slender 

 terminal joint to the palpi there are several species nearly allied to Callimormus, but 

 which have a brand on the primaries of the male formed of two short longitudinal 

 streaks. Phlebodes ittona, Butl., is one of these forms, and we take it as the type of 

 the present genus, which also includes Apaustus virginius, Moschl., from Surinam, 

 Cobalus ludens, Mab., from Chiriqui, and one new species described below. The 

 genitalia of the males of M. ittona and M. cometho are also very different in structure 

 from those of any of the species of Callimormus. 



The antennas are as long as, or more than, half the length of the costa, and have an 

 elongate club, terminating in a long crook. The third joint of the palpi is very long, 

 slender, erect, and pointed. The primaries are narrow, rather blunt at the tip; the 

 cell is less than two-thirds the length of the costa; the discocellulars are oblique, 

 the upper one longer than the lower ; the lower radial is depressed at the base (very 

 slightly so in M. cometho) ; the first branch arises about the middle of the median 

 nervure, the second close to the lower angle of the cell. The secondaries are rounded 

 at the anal angle ; the cell is half (M. cometho), or more than half (M. ittona), the 

 length of the wing ; the discocellulars are transverse and very faint. The body is rather 

 slender. The middle tibiae are not spined and the hind tibiaj have two pairs of spurs. 

 The primaries of the male (Tab. CIII. fig. 40) have a brand formed of two short longi- 

 tudinal streaks covered by coarse scales, one tilling the angle between the base of the 

 second median segment and the first median branch, the other immediately below it. 



a. Secondaries in part silvery beneath. 



l. Mnestheus ittona. (Tab. CIII. figg. 38-41, <* .) 



Phlebodes ittona, Butl. Trans. Ent. !Soc. 1870, p. 508 \ 



Alia obscure fuscis, stigmate concolore, anticis maculis tribus ia linea obliqua infra et ultra cellulam albis : 

 subtus anticis ut supra, sed macula submediana obsoleta; posticis margine interne- ipso, et fascia lata fere a 

 margine interno (ad apicem curvata) et usque ad centrum marginis exterioris extendente (iliic angustiore) 

 argenteis aut flavo-argenteis. 



2 mari similis. 



Hab. Panama, Chiriqui (Arce, Ribbe), Veraguas (Arce).— Venezuela 1 ; Bolivia. 

 Dr. Butler described P. ittona from a male insect from Venezuela, which is now in 



