LEPIDOPTERA HETEROCERA. 879 



Genus 2. DIASTEMA. 



Corpus sat gracile. Proboscis mediocriter longa. Palpi ob- 

 lique ascendentes ; artieulus 3us conicus, brevissimus. Antennae 

 validae, corporis dimidio multo longiores. Abdomen alas posticas 

 vix superans. Pedes sat validi ; tibia? posticus calcaribus longissi- 

 mis. Alae anticae sat angustae, apud costam rectae, apice subrotun- 

 datae, margine exteriore mediocriter obliquo. Mas. — Antenn.e 

 ciliatae. 



Diastema, Guen. Noct. ii. 317. 

 Placodes, p., Boisd. 

 Plusia, p., Treit. ; Dup. 



Body ratber slender. Proboscis moderately long. Palpi ob- 

 liquely ascending ; third joint minute, conical, less than one-i'ourth 

 of the length of the second. Antennae stout, much more than half 

 the length of the body. Abdomen hardly extending beyond the 

 hind wings. Legs rather stout ; hind tibiae with very long spurs. 

 Fore wings rather narrow, straight in front, somewhat rounded 

 at the tips, moderately oblique along the exterior border. Male. 

 Anntenae ciliated. 



1. Diastema virgo. 



Albido -rosea ; abdomen cinereum linea alba ; alee anticce glauces- 

 cente varice, apud marginem exteriorem obscuriores, maculis 

 duabus subcostalibus fuscis, macularum marginibus, lineis 

 duabus obliquis postice connexis lineaque submarginali albi- 

 dis ; posticce cinerece, margine fuscescente, ciliis pallidis. 



Placodes virgo, Boisd. Ind. Meth. 129, 1037. 



Plusia virgo, Treit. Suppl. 130. Eversm. Faun. Volg- Ural. 313. 



Dup. Suppl. iv. 521, pi. 90. Herr.-Schceff. Schmett. Eur. ii. 



pi. 49, f. 248,249. 

 Diastema virgo, Guen. Noct. ii. 317, 1128. 



Ural Region. 



2. Diastema Tigris. 

 Albida, testaceo subtincta ; alee anticce lineis transversis plunmis 

 testaceis, fasciis quatuor incomplelis macularibus gutiisque 

 marginalibus cervinis ; posticce albce. 



Diastema Tigris, Guen. Noct. ii. 1127. 

 Colombia. 



