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-tifihs of the width; sixth 

 arcuato-truncate at lip; 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 in the female. Length 



9.0 mm.; width 1.45 mm. Lower California peninsnlare 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-testaceou.s 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 ihau 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 less than basal lialf, the depression 

 along the sutural bead also linearly punctate as usual; abdomen rather 

 more shining than the anterior part.s, slightly narrower than the elytra, 

 finely, rather sparsely punctate. Male with a short, broad transverse 

 fold behind the middle of the secoud 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 L35 mm. Texas snturale 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, tlie 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 close- Set, confused but with feeble traces of the two smooth long- 

 itudinal lines on each eljtron formed by approximaie series, which is a 

 feature more or less obvious throughout the genus; abdomen narrower 



