LEPTDOPTERA HETEROCERA. 429 



Genus 3. HYDKOPHYSA. 



Mas. Corpus gracillimum. Ocelli nulli. Proboscis robusta, sat 

 longa. Palpi quatuor longitudine aequales ; articuli non diversi ; 

 3us pilis apicalibus squamosis. Antennae Ionise, graciles, valde 

 moniliformes. Abdomen alas posticus longe superans. Pedes gra- 

 cillimi. Alae tenuissimas, oblongae, angustae, rotundatae ; posticae 

 breves. 



Hydrophysa, Guen. Delt. et Pyral. 259. 



Male. Body very slender. Ocelli obsolete. Proboscis ro- 

 bust, rather long. Labial and maxillary palpi of equal length ; 

 their joints alike; the third with squamous hairs. Labial palpi 

 much apart, even at the base. Antennae long, slender, very monili- 

 form. Abdomen extending far beyond the hind wings. Legs very 

 slender. Wings very delicate, oblong, narrow, rounded at the tips, 

 with like markings, which consist of numerous slender lines. Hind 

 wings short. 



1. Hydrophysa. psyllalis. 



Mas. Alba ; alee nigra et fiavescente-fusco varies ; anticce strigis 

 basalibus nigris albisque, linea arcuata alba, litura X.-formi 

 nigra, linea exteriore arcuata alba, spatio apicali flavescente, 

 linea submarginali alba nigro lineata, litura \J-costali lituram 

 Y-nigram includente ; posticce lineis alternis nigris albis 

 etflavescentibus. 



Hydrophysa psyllalis, Guen, Delt. et Pyral. 259. 



Brazil. 



Genus 4. OLIGOSTIGMA. 



Corpus gracile. Ocelli nulli. Proboscis robusta, squamosa. 

 Palpi quatuor longitudine aequales ; labiales graciles, ascendeutes, 

 disjuueti, squamosi; articulus 3us 2o non gracilior. Antennae 

 longae, nonnunquam crassae et velutinae, nonnunquam moniliformes. 

 Abdomen alas posticas longe superans. Pedes longissimi ; calcaria 

 gracillima. Alae valde oblongae, vittis parallelis albis fulvisque 

 alternis ; anticae margine exteriore sinuato, margine interiore sub- 

 uoncavo ; posticae punctis marginalibus nigris ocellatis saepe or- 

 natae, apud angulum interiorem nonnunquam incisae. 



