ART. 19 EEVISION OF THE USECHINI — BLAISDELL 11 



spinule short and stout and probably a male character. A similar 

 structure occurs in the species of Usechus. 



Genotype. — UsecJiimorpTia harheri, new species. 



USECHIMORPHA BARBERI, new species 



Plate 1, figures 3, 4 



Color rufo-piceous, surface abundantly clothed with small decurved 

 yellowish, slender scalelike hairs; surface more or less coated with a 

 light gray scaly substance. 



Head and mouth parts relatively small. Epistomal region before 

 the antennae depressed, obsoletely sculptured and sparsely pubescent, 

 abruptly and arcuately limited above by the raised surface of the 

 front before the eyes; epistomal apex broadly arcuate between the 

 feeble sinuations at the positions of the oblique sutures, angles mod- 

 erately rounded with the sides of the front, surface feebly convex. 

 Front between and anterior to the eyes obsoletely sculptured and 

 glabrous; vertex finely and subasperately sculptured. Labrum trans- 

 verse, arcuate at apex, surface with few punctules and very fine hairs. 

 The sharp lateral borders of the genal plates are visible from above 

 and the basal joint of the antennae at apex is nearly flush with it. 

 Head in repose retracted to the raised frontal line. 



Antennae clavate, length slightly greater than the width of the 

 head across the eyes; basal joint less than twice as long as wide, 

 second scarcely longer than wide, third to the seventh, inclusive, 

 subequal in size and form, about as long as wide, short and subcy- 

 lindrical; eighth wider, scarcely longer, flaring and acutely margined 

 at apex; joints two to eighth, inclusive, form a rather slender funicle. 

 Ninth and tenth joints strongly transverse, the former twice as wide 

 as the eighth, tenth a third wider than the ninth, the tenth rather 

 deeply and arcuately emarginate receiving the smaller eleventh joint. 

 Joints ninth, tenth, and eleventh forming a sUghtly compressed, oval 

 club. 



Pronotum as long as wide, widest at about middle across the apices 

 of the antennal fossae and there broadly angulate, thence the lateral 

 edge of the antennal fossae is straight, convergent, slightly declivious 

 anteriorly but not extending as far forward as the inner border of 

 the fossa, straight posteriorly and equally convergent to the obtuse 

 basal angles; base rather strongly arcuate and apparently finely 

 margined; basal angles more acutely rectangular beneath the more 

 superficial obtuse line; apex truncate in feeble circular arc between the 

 slightly rounded angles; disk irregularly convex, narrowly impressed 

 along the median Une from the apex, becoming more broadly so 

 behind the middle, rather arcuately declivious anterolaterally form- 

 ing the inner boundary of the antennal fossae which are wholly 

 visible from above as the result; surface obscurely quadritumescent. 



