Casey — A Revision of the American Paederini. 239 



11 — Head large, nearly as wide as the elytra and not very much longer 



than wide. Body rather stout, parallel, pale ochreo -testaceous in 

 color, the head, a large internally roundedlspot on each elytron extend- 

 ing from basal fourth to apical sixth and from the side margin to 

 inner third, and the last two abdominal segments, black, the legs and 

 antennae very pale as usual; head of the usual form, but little narrower 

 before than behind the eyes, the latter moderate in size and promi- 

 nence; prothoras three -fourths to four-flfths as wide as the 

 head, longer than wide, of the usual form, the sides rather strongly 

 rounded at apical fourth, thence moderately converging and straight to 

 the broadly rounded basal angles; elytra large, only slightly elongate, 

 feebly narrowed at tip, a third wider and longer than the prothorax; 

 abdomen rather wide, gradually broader behind. Male unknown. 



Length 3.5 mm.; width 0.6 mm. Iowa simnlans n. sp. 



Head smaller, much narrower and more elongate, distinctly narrower than 

 the elytra .12 



12 — Form slender, rather shining, pale ochreo-testaceous, with the head, a 



large internally rounded spot on each^elytron from basal fourth to apical 

 eighth and from the side margin Jto inner fifth, and the last three 

 abdominal segments, black, varying to completely black, with the 

 elytral suture feebly and narrowly rufescent, the legs and antennae always 

 pale honey-yellow throughout; eyes strongly convex and prominent, at 

 their own length from the base; prothorax short though longer than 

 wide, the sides strongly rounded at apical fourtii, thence strongly con- 

 verging and straight to the b.isal angles, the side margins bristling 

 with several long stiff black setae; elytra distinctly elongate, feebly 

 narrowed at tip, two-fifths wider and longer than the prothorax; 

 abdomen at base slender, distinctly narrower than the tip of the elytra, 

 gradually slightly wider behind. Male with the fifth ventral feebly flat- 

 tened along the middle, the acute cusp-like incisure of the sixth large, 

 as deep as wide, with its sides broadly rounding outward posteriorly, 

 the edge only anteriorly and finely beaded, the opening fully half as 

 wide as the segmental apex. Length 3.3-3.7 mm.; width 0.5-0.55 mm. 



Texas (Galveston) iuconstans n. sp. 



Form slender, nearly as in the preceding, pale testaceous in color, the head, 

 a larger but less elongate, internally rounded spot on each elytron, ex- 

 tending from basal third or two-fifths to apical eighth and from the 

 side margin to inner fifth or sixth, and the last two abdominal seg- 

 ments, black; head relatively still narrower and more elongate, the 

 eyes somewhat larger but less prominent and at rather more than their 

 own length from the base, the sides behind them rather less converging 

 to the broadly arcuato-triancate base; prothorax much more elongate, 

 the sides at apical fourth more broadly rounded and thence only feebly 

 converging to the basal angles, the side margins with only about two 

 stiff setae, one anterior and the other near the base; elytra nearly sim- 

 ilar but still more elongate, a third or fourth wider and longer than 

 the prothorax ; abdomen very slender, still more notably narrower at 

 base than the apex of the elytra, gradually perceptibly wider behind. 

 Male with the fifth ventral narrowly and feebly impressed along the 

 median line, the notch of the sixth very wide, the widely diverging 



