292 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



notum is chestnut brown, deepening to blackish along caudal mar- 

 gin, with flecks of the same latero-cephalad and slightly paler, ap- 

 proaching tawny, in large median portion of this dark area, which 

 runs to the cephalic margin above the head, leaving only the moder- 

 ately broad lateral marginal portions ochraceous-bufl". Tegmina 

 transparent, light ochraceous-bufi', humeral trunk chestnut brown 

 to slightly beyond forking of mediastine vein, the humeral vein dark- 

 ened a brief distance beyond, other veins very weak ochraceous- 

 tawny. Dorsal surface of abdomen buckthorn brown shading to dres- 

 den brown distad on each tergite, broadly margined laterad and all 

 but meso-proximal portion of supra-anal plate ochraceous-buff tinged 

 with buckthorn brown. Ventral surface chestnut brown and buffy, 

 ochraceous-tawnj^ with buffy maculations in paratype, ventral sur- 

 face of abdomen apricot yellow and broadly bordered with chestnut 

 brown, this including all but a median fleck on the subgenital plate, 

 the other sternites very narrowly margined laterad with buffy, in 

 the paratype ochraceous- tawny, the darker lateral markings more 

 suffused and breaking laterad into buffy areas on the proximal ster- 

 nites. Limbs brussels brown, margins brown in paratype; the 

 spines darker and more reddish. 



The measurements for the two females are as follows, those of 

 the type being given first. Length of body 34.7-36.3, width of 

 interocular space 2.3-2.1, length of pronotum 10.2-10.7, width of 

 pronotum 15.3-14.8, length of tegmen 38.3-38.8, width of tegmen 

 15.2-14 mm. 



In addition to the type, a female paratype is before us, taken at 

 La Palisa del Bracho, Rio Salado, Santiago del Estero, Argentina, 

 in December. 



CORYDIINAE. 

 CEUTHOBIA'-- new genus. 



This genus is erected to include the Argentinian species Melestora 

 fulvella Rehn and lepta, here described. With it, the closely allied 

 genus Ceuthohiella is compared on page 247. 



Genotype. — Ceuthobia lepta new species. 



The male sex only is known for the species included. 



Generic Description. Size minute, form elongate elliptical, slen- 

 der when compared with the allied genera. Exposed surface very 

 weakly to moderately supplied with minute erect hairs. Head with 

 interocular area not rugose^ distinctly wider than interval between 

 antennal sockets. Pronotum with greatest width meso-caudad and 

 caudal margin very broadly convex; latero-caudal oblique sulci 

 moderately well defined, no trace of medio-longitudinal sulcation. 

 Tegmina with first discoidal sectors longitudinal, but those toward 

 the sutural margin oblique, veins connected by well-defined cross- 



^"^ From K2j6o!;and ^I'ow, in allusion to the secretive habits of the species. 



