PANTOMORUS OF AMERICA NORTH OF MEXICO Dar h 
different from any of the southern Texas forms; but a good many 
individuals from central and south-central Texas exhibit various 
intergrading characteristics tending to bridge the gap between ele- 
gans and pallidulus, and to a lesser extent between elegans and 
viridis. From farther south in Texas there are at hand what 
appear to be annectent specimens between pallidulus and viridis, 
and between viridis and eximius. The fact that viridis, ex- 
timius, and pallidulus all inhabit the same general section (San 
Antonio to Brownsville), in which no effective physical barriers 
exist, seems to preclude the supposition that they are subspecies, 
in the geographic sense; nor are host-plant barriers at all likely 
in a group whose species are as notoriously polyphagous as those 
in Pantomorus. Much of the evidence suggests the existence of 
four species, or “incipient” species, that interbreed rather freely 
on the overlapping borders of their ranges, or the three forms from 
southern Texas may represent tropical infusions whose close relation 
to elegans is more apparent than real. The dividing line between 
northern Texas and the section south of San Antonio, as shown 
on soil and vegetation-zone maps, coincides roughly with the line 
between the range of elegans to the north and the ranges of the 
other three forms to the south, but the significance of this to the 
present study is not clear. Whatever the true status of these segre- 
gates, they should be recognized by names, and they are here arbi- 
trarily designated “varieties.” Of these so-called varieties, eximius 
is relatively isolated by its setose corbel plate, and by the slightly 
longer fifth abdominal sternite and the larger denticles on the second 
sternite, in the male. 
KEY TO VARIETIES OF ELEGANS 
1. Corbel plate densely setose; color above green; abdominal sternite 2 of 
male denticulate; San Diego 
(10) elegans eximius, new variety (p. 32). 
Corbel plate squamose; color usually green; abdominal sternite 2 of 
maleawith;- or without Genricleseaor os ko eel Ae ae ea ee 2 
2. Abdominal sternite 2 of male not denticulate; usually with prothorax 
subparallel basally, body slenderer, elytral setae longer, and elytra 
unicolorous or nearly so; chiefly South Dakota to Texas 
(7) elegans elegans (Horn) (p. 27). 
Abdominal sternite 2 of male with or without denticles; prothorax nar- 
rowed basally, body stouter, setae shorter, at least a lateral vitta 
onselytronusually -present;:. southern, Texas. 222 7-2) 3 
3. Color green, rarely gray; elytra basally and pronotum strongly convex 
longitudinally in both sexes; funicular segment 2 considerably longer 
than 1; abdominal sternite 2 of male denticulate 
(8) elegans viridis (Pierce) (p. 29). 
Color gray, occasionally green; convexity of pronotum and elytra feeble 
in female, feeble to strong in male; funicular segment 2 typically 
only a little longer than 1; sternite 2 of male usually without 
GentiCle guesses 77 ie Sos 2 (9) elegans pallidulus Emden (p. 31). 
(7) PANTOMORUS (PHACEPHOLIS) ELEGANS ELEGANS (Horn) 
(Figs. 2, J, P; 3, D, HE; 4, G4, N; 5, TI) 
Phacepholis elegans Horn, Amer. Phil. Soe. Proc. 15: 95, 96, 1876; Henshaw, 
List of the Coleoptera of America North of Mexico, p. 135, 1885; Pierce, 
U. S. Natl. Mus. Proc. 37: 361, 1909; Pierce, Jour. Econ. Ent. 3: 363, 
1910. 
Pantomorus (Phacepholis) elegans (Horn), Pierce, U. S. Natl. Mus. Proc. 
45: 416, 417, 1913. 
