352 Field Museum of Natural History — Zoology, Vol. VII. 



a broad irregular, pale median fascia; clothed with rather dense, 

 semierect, moderately long, coarse, pale hairs, intermixed with 

 longer, sparse, erect, pale hairs; pubescence densest on head and 

 thorax. Head rather coarsely, irregularly but not very densely 

 punctate, front with two large feeble impressions between the not 

 very prominent eyes. Antennae moderately slender, extending to 

 basal fourth of elytra; the second, third, fourth, and fifth joints 

 elongate, equal, subcylindrical ; the outer joints gradually shorter 

 and subserrate; the last joint longer than the tenth, acuminate at 

 apex. Thorax two-thirds longer than broad; sides moderately con- 

 stricted before the middle, strongly constricted behind ; base narrower 

 than apex; ante-scutellar impression distinct; punctuation similar 

 to that of head but slightly finer. Elytra less than twice as wide as 

 thorax at base; humeri distinct; sides parallel nearly to middle, 

 then arcuately broadening to apical fourth, then narrowing to the 

 conjointly rounded apices; disk moderately convex, striate with rows 

 of coarse perforate, quadrate punctures, which become rather suddenly 

 finer at the middle and obsolete at apical fifth; intervals flat, as wide 

 as punctures at the base, finely punctulate; a very broad, irregular, 

 pale testaceous fascia at the middle, broadest at the flanks, the posteri- 

 or edge usually margined with fuscous. Body beneath and abdo- 

 men densely and rather coarsely punctate. Length 7.8-8.5 millim. 



Male. Fifth ventral segment deeply emarginate at apex; sixth 

 ventral longer than broad, sides moderately narrowing to apex, which 

 is broadly emarginate, the angles prolonged and turned upward; 

 last dorsal longer than broad, narrower towards apex than last ven- 

 tral, sides strongly narrowing to apex, the angles prolonged into long 

 upward curving spines between which the apex is very deeply trian- 

 gularly emarginate, (PI. VI, figs. 14, 15.) 



Female. Fifth ventral feebly arcuate, nearly truncate at apex; 

 sixth ventral short, rounded; sixth dorsal slightly longer than last 

 ventral, sides nearly parallel, apex broadly rounded, angles obtusely 

 rounded. (PI. VI, fig. 16.) 



Greatly resembles fuchsii Schapffcr, from wliicli it may be 

 distinguished by the thorax having a distinct ante-scutellar impres- 

 sion and the sides more strongly compressed towards base; the fonn 

 of the elytra, the conjointly rounded apices, and the very curious ab- 

 dominal characters of the male are also distinguishing characters. 



This species is variable in clytral markings. In the type the basal 

 half of the elytra is but slightly darker than the fascia, the anterior 

 margin of which is blended into the color of base; behind the fascia 



