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IOWA ACADEMY OF SCIENCE 
11. NARVESUS Stal 
Stal, (e)128, (f)124; Champion, 188. 
A monotypic North American genus. ^ 
N. CAROLiNENsis Stul has been found in Missouri, Carolina, Texas, Mexico and 
the Antilles. The lateral angles of the pronotum vary from acute to rounded 
at the apex; the post-ocular portion of the head is armed with two sub- 
conical tubercles. 
12. DIADITUS Stal 
Stal, (e)128, (b)150, (f)124; Champion, 188. 
Only one of the four described species of this genus occurs north of Panama. 
The genus may be distinguished by the characters given in the key. 
D. piCTiPEs Champion, Texas, Mexico. Joint 1 of antennae shorter than 
head; joint 2 about one-fourth longer than 1 and clothed with projecting hairs; 
frontal spines stout, blunt at tip; eyes small; anterior tarsi with joints 2 and 
3 almost fused into one. 
13. ONCOCEPHALUS Klug 
Klug (1830); Stal, (e)128, (f)123 (Spilalonius.) ^ 
O. GENicuLATus Stal. Body a pale grayish yellow, slightly hairy; legs yel- 
low, glabrous; antennae of the male slightly longer than the ante-ocular part 
of the head; posterior femora just reaching apex of abdomen. Southern U. S. 
O. APiciJLATUs Reuter (b). Antennae of the male scarcely equalling in length ,» 
the ante-ocular part of the head; posterior femora not reaching apex of abdo- 
men. Missouri. 
Subfamily REDUVIINAE. 
14. NALATA Stal 
Stal, (a)79, (b)123, (f)llO, 119; Champion, 190. 
The head has three prominent, conical, setiferous tubercles on each side be- 
neath; the femora are asperate and setose; the anterior trochanters are each 
armed with a stout spine. 
a. Anterior lobe of pronotum with a regular marginal row of tubercles and 
a second regularly arranged row near the median sulcus rudis. 
aa. Anterior lobe of pronotum with marginal rows of tubercles scattered and 
irregular, but median rows regular setulosa. 
N. RUDIS Stal. Mexico. 
N. SETULOSA Stal. Mexico. 
15. MICROLESTRIA Stal ** 
Stal, (f)llO, 120; Champion, 195. 
Stal separated this genus from Nalata fourteen years after the latter had 
been described (1858-72.) Some of the principal differences in the later genus 
are the presence of tubercles on the anterior lobe of the pronotum, the presence 
of a spine on the anterior trochanters and the distinct separation of the mem- 
brane and corium. 
M. FUSCicoLLis Stal, (a) 80. Head pronotum and scutellum, dull and rugulose; 
anterior lobe of pronotum distinctly tuberculate. Mexico and southward. 
