244 PROCEEDINGS OF THE NATIONAL MUSEUM. vol xxiii. 



sliolitly dtirkt'iied with fuscous; dorsal margin about as much sprinkled 

 with dark scales as the rest of the wing. Hindwings dark gray, cilia 

 lighter yellowish. 



Venation is identical with that of somnulentella. Abdomen above 

 dark gray, lielow silvery yellow with black atoms. Anal tuft ochreous; 

 legs 3"ellow, speckled with black, silvery white on the inside; hairs on 

 posterior tibia whitish ochreous; tarsi annulated with l)lack. 



Alar expanse, 6 to ^^.(S mm. 



Described from 12 specimens, bred from IpomcBa, collected by Dr. 

 Dyar at Palm Beach, Florida. 



Type.— No. 4954, U.S.N. M. 



The species is of a lighter, more j^ellowish color than most speci- 

 mens of somnulentella. The dorsal unspeckled streak generally found 

 in somnidentclld is in this species unicolorous with the rest of wing, 

 while the basal part of the wing is more sparsely speckled. Still these 

 points are somewhat variable in sontnidentella., but of a very large 

 series of somnidentella none were as small as the largest minor. 



Larva feeds in exactly the same fashion as the cosmopolitan species, 

 making irregular clear blotches; the angular pupa is identical in form, 

 possibly a little more robust, and is exposed, attached by the extrem- 

 ities to silken threads. 



Larva differs from that of somnnlentella in the absence of the lateral, 

 yellowish white, polished tubercles, which are found in mriinulentella 

 on joints 5, 8, and 9, and the subdorsal series of purple spots is very 

 much less pronounced, the entire larva being more uniformly green- 

 ish purple. 



There is no possibilit}^ of the small size being due to unnatural con- 

 ditions b}^ transferring the larva from the tropical climate northward, 

 as Dr. Dyar l)red exactly similar small moths — and nothing but these — 

 on the spot. Besides a very large number of larvfB were examined 

 carefully by the writer and the differences were found to be constant. 



METRIOCHROA, new genus. 

 (Type, MetriocJiroa psycholrklla Biisck.) 



Antenni\? a little longer than forewing. simple, basal joint with small 

 pecten l)eneath. Labial palpi moderate, smooth, slighth" curved, in 

 the living insect erected in front of face, in dr}" specimen porrected, 

 or drooping; second joint with scales projecting at apex, terminal as 

 long as second, rather blunt. Maxillary palpi small but distinct, 

 slightly curved upward, in dead specimen drooping. Tongue mod- 

 erate, spiraled. Face and head smooth. Forewings elongate, lance- 

 olate, pointed, cell very long. Hindwings very narrow setiform. 



Antenna? and middle legs smooth with end of tibiiB thickened. Pos- 

 terior tibiaj clothed with long spiny hair^ above; inner spurs twice as 

 long as outer spurs. 



