NO. 3660 MICROLEPIDOPTERA, XVII—CLARKE 49 
related to diamphidia than any of the others but is easily separated 
by the genitalia. 
Lasiothyris diamphidia, new species 
Figure 26; PLATE 4 (ria. 5) 
Alar expanse 12-14 mm. 
Labial palpus ocherous white; second segment shaded with buff 
and irrorate with brown on outer side; apex of third segment fuscous. 
Antenna grayish, speckled fuscous dorsobasally; scape ocherous 
white with fine fuscous irrorations. Head ocherous white, mixed 
with pale brown laterally and on crown. Thorax light brown, slightly 
suffused fuscous; tegula ocherous white posteriorly. Forewing ground 
color ocherous white suffused with buff; basal fifth light clay color, 
forming an ill-defined basal patch; costa finely strigulated with fus- 
cous; from middle of costa to dorsum an inwardly oblique, clay color, 
transverse fascia, wider on dorsum than on costa and mixed with 
blackish-fuscous scales on dorsum and on dorsal half of inner mar- 
gin; on tornus a large, tawny blotch, irrorate with blackish fuscous; 
from apical fourth of costa a tawny fascia outwardly oblique and atten- 
uated to vein 4; subapically, on costa, a tawny spot; apical portion 
of wing with ill-defined, light clay color, transverse dashes and scat- 
tered blackish-fuscous scales; underside strongly infuscated except 
on apical half of costa; cilia buff mixed with gray-tipped scales. 
Hindwing ocherous white with grayish-fuscous shading at anal angle 
and on inner margin; apex with some short grayish-fuscous strigulae; 
cilia light buff with grayish subbasal line. Foreleg ocherous white; 
femur and tibia heavily irrorate with grayish fuscous on outer side; 
tarsal segments almost wholly overlaid fuscous; midleg similar to 
foreleg but tarsus less strongly marked; hindleg ocherous white; 
femur lightly irrorate with grayish fuscous on outer side. Abdomen 
grayish fuscous dorsally; buff, with fuscous irroration ventrally. 
Male genitalia slide JFGC no. 11657. Harpe on right side broad, 
tapered to a rounded cucullus; sacculus strongly sclerotized, pro- 
duced outwardly and clothed with stout, long setae; sclerotization 
of sacculus extended to middle of harpe into two thickened lumps. 
Left harpe moderately broad basally, abruptly narrowed into a slen- 
der terminal portion; from base of sacculus a long, hooked process. 
Uncus minutely developed and fused with bases of socii. Socii fused 
along median line, except at distal end. Vinculum coalesced and in- 
timately associated with anellus. Tegumen nearly as long as harpe. 
Anellus a long U-shaped plate fused with aedeagus. Aedeagus long, 
rather slender open S-shaped, terminating in a sharp point; vesica 
unarmed. 
Female genitalia slide JFGC no. 11658. Ostium asymmetrical; 
288-584—68—_5 
