332 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



tirely pale yellow. Scutellum tan colored. Elytra strongly costate with 

 the intervals geminate striate punctate; surface alutaceous, somewhat 

 shiny, pale yellow with a lateral brown stripe running down the side 

 but not reaching the middle, and a brownish spot at the apical curve 

 of each elytron, the suture brownish about and below the scutellum 

 and near apex. Body beneath pale with a brown breast and the 

 tibiae and tarsi and apex of hind femora brown. Length 4.7 mm.; 

 width 2.2 mm. 



Type, female, Bowditch collection, MCZ 30683, from Mapiri River, 

 Guanay, Bolivia, 1500 ft., August 1895. 



Remarks: This is the smallest as well as palest of the species with 

 the depressed lower front of the face. Bowditch has attached the 

 manuscript name mapirii to it. 



Hystiopsis bella, new species 



Figures 75, 77, 78 



About 5.5 mm. in length, oblong oval, shining, although finely 

 alutaceous, elytra strongly costate, antennae dark except the last 

 two or three joints, head dark over occiput, pale in lower front, thorax 

 and body beneath except the breast pale yellow, the femora pale with 

 a dark apex, tibiae and tarsi more or less dark, elytra with a pale margin 

 and dark piceous within, on each elytron a pale spot in the basal half 

 variable in size and a pale fascia, varying in width, below the middle. 



Head with interocular space approximately half width of head, a 

 shallow median depression above the somewhat swoUen frontal 

 tubercles, the upper half of head deep piceous, alutaceous although 

 shiny with fine punctation, lower front depressed, without carina and 

 with two transverse ridges, one on either side, lower face pale, mouth- 

 parts tinged with brown. Antennae long, slender, dark brown except 

 the terminal joints which are pale, the last joint tipped with brown. 

 Prothorax nearly twice as wide as long with slightly curved sides and 

 a transverse depression, alutaceous, finely punctate, entirely pale 

 yellow. Scutellum tan colored. Elytra not very convex, each with 7 

 or 8 more or less distinct costae, the intervals having irregularly striate 

 punctation; surface alutaceous but shiny, deep piceous with a pale 

 margin and in the basal part a pale spot, sometimes enlarged to reach 

 the base, and a broad pale fascia below the middle that occasionally is 

 narrowed and sometimes does not reach the margin. Body beneath 

 pale with a brown breast, the femora pale with dark apices, hind tibiae 

 and tarsi more or less dark, in one specimen the legs entirely pale. 

 Length 5.5-5.7 mm. ; width 2.8-3 mm. 



Type, male, USNM 66838; two paratypes, females, all from Loma 

 Alta, Bolivia, collected by G. Pinckert, March 21, 1957. Other speci- 



