Casey — A Revision of the American Paederini. 39 
the elytra, the punctures fine and rather close. Male with a small but 
broadly impressed transverse fold near the middle of the second ven- 
tral, occupying about median twelfth or fourteenth of the width, the 
third with the small fovea not broadly impressed but unusually abrupt 
and perforate, the lobe large, parabolic, extending beyond the apex of 
the fourth and occupying fully median two-fifths of the width; sixth 
_ arcuato-truncate at tip; female with the abdomen wholly unmodified. 
Length 10.5 mm.; width 1.68 mm.- Arizona (Nogales). 
arizonense Horn 
Var A— Smaller in size and of still narrower form, the head and elytra 
rather less depressed; head less elongate, with more pronounced 
basal angles and more prominent eyes; prothorax smaller, with 
smaller and feebler punctures; elytra similarly sculptured but rather 
narrower and more elongate; abdomen similar inthe female. Length 
9.0 mm.; width 1.45 mm. Lower California.....peninsulare n. var. 
21 — Form rather stout, pale testaceous in color, the elytra still paler and 
more flavate, the suture broadly clouded with blackish-piceous, the 
abdomen infuscate or piceo-testaceous throughout; head only moder- 
ately elongate, almost as wide as the elytra, alutaceous in lustre, the 
sides very slightly converging behind the eyes, the basal angles broadly 
rounded; punctures not very coarse and decidedly sparse; prothorax 
parallel, much narrower than the head, only slightly longer than wide, 
strongly alutaceous, the punctures rather small in size but distinct, 
sparse; elytra distinctly elongate, parallel, fully two-fifths longer and 
wider than the prothorax, slightly alutaceous, the punctures not very 
coarse and rather close-set, confused but with two widely spaced 
close-set series on each elytron in Jess than basal half, the depression 
along the sutural bead also linearly punctate as usual; abdomen rather 
more shining than the anterior parts, slightly narrower than the elytra, 
finely, rather sparsely punctate. Male witha short, broad transverse 
fold behind the middie of the second ventral and occupying about 
median tenth or twelfth of the width, the fovea of the third circular, 
somewhat perforate and small in size, the lobe large, regularly ogival 
in outline, extending slightly beyond the apex of the fourth and occu- 
pying median two-fifths of the width; sixth obtusely rounded at tip. 
Length 7.8 mm.; width 1.35 mm. Texas...............suturale n. sp. 
Form more elongate, dark and uniform red-brown in color, the abdomen 
black with the apex slightly and indefinitely paler; legs very pale 
flavo-testaceous, the antennae infuscate; surface alutaceous, except the 
abdomen which is strongly shining; head rather small, much narrower 
than the elytra, the sides feebly converging and straight for some dis- 
tance behind the eyes, the basal angles broadly rounding thence to the 
neck, the punctures only moderately coarse and not very close-set, 
rather uneven; prothorax distinctly elongated, narrower than the head, 
parallel, the punctures not coarse and rather feeble but distinct, more or 
less sparse; elytra longer than wide, rather convex transversely, much 
longer and wider than the prothorax, the punctures comparatively small 
and ciose-set, confused but with feeble traces of the two smooth long- 
itudinal lines on each elytron formed by approximaie series, which is a 
feature more or less obvious throughout the genus; abdomen narrower 
