414 KHOPALOCEEA. 



clothing of the middle joint is more open and not so closely set. The primaries have 

 no costal fold; the third median segment is very short; the lower and middle disco- 

 cellulars subequal, the upper discocellular distinct ; the third median and the second 

 subcostal segments are subequal and short ; the discocellulars and radial are feeble 

 but distinct; the hind tibiae have two pairs of spurs and a distinct tuft at the 

 proximal end. 



Two closely-allied species are all that we can at present refer to this genus : of these, 

 the range of D. laccena is given below ; the other is Ephyriades variegata of Plotz, an 

 insect of Southern and Eastern Brazil. 



l. DiaBus lacaena. (Tab. LXXXVII. fig. 26.) 



Leucochitonea lacama, Hew. Ex. Butt., Leucochitonea, f. 3 \ 

 Ephyriades lacana, Plotz, Jahrb. nass. Ver. xxxvii. p. 3 (1884) 2 . 



Alis anticis ad basin ferrugineis, area mediana albida, maculis hyalinis nigro cinctis, duabus ad costam, una 

 magna cellulari, duabus infra venam medianam bene separatis et duabus infra ramum medianum primum, 

 area apicali fusco-nigricantibus, squamis canis irregulariter notatis, punctis quafcuor subapicalibus in linea 

 irregulari duobus majoribus ad costam et puncto parvo discali hyalinis ; posticis ad basin fusco-nigri- 

 cantibus, bitriente distali albicante ad marginem internum et ad angulum analem fusco variegatis maculis 

 octo hyalinis, ea in cellula subquadrata et maxima, stria anteciliari fusca, ciliis albis fusco interruptis : 

 subtus multo albican tioribus ; anticis ad apicem tantum fuscis ochraceo atomatis ; posticis ad angulum 

 analem fusco variegatis. 



Hab. Mexico, Atoyac (H. H. Smith, Schumann) ; Costa Rica, San Franciso, Cache 

 (Rogers); Panama. Volcan de Chiriqui (Champion), Veraguas (Arce). — Brazil 1 ? 



Hewitson's figure agrees with the Central-American form of this species rather than 

 with the Brazilian, to which Plotz's name, Ephyriades variegata, is applicable. It is 

 thus more than probable that Hewitson's specimen was wrongly ascribed to Brazil. 



In Costa Eica and Chiriqui I), lacaena appears to be a common species, as we have 

 many specimens from those countries. We have also a few from the Mexican State of 

 Vera Cruz, but none from the intervening country. 



I), laccena differs from D. variegatus in having a much wider and whiter area in the 

 middle of the primaries ; the secondaries, too, are much whiter over the costal and 

 apical areas. 



The male genitalia have the tegumen Math a single blunt point; the harpes are 

 deeply cleft in the middle, and from the bottom of the fissure a ribbon-like lobe pro- 

 ceeds, and is curved upwards and then inwards. (See Tab. LXXXVII. fig. 26.) 



ONENSES, gen. nov. 



The remarkable species described by Felder as Leucochitonea hyalophora requires a 

 separate genus for its reception. The outer margin of both wings is very uneven ; the 

 primaries have a distinct projection at the end of the second median branch and smaller 

 ones at the ends of the upper radial and submedian, the latter forming a prominence at 



