270 Natural History Bulletin. 



Ferruginous, abdominal carinse divergent, springing from a tri- 

 angular pubescent pad. i last ventral with a deep, sharply 

 defined, small, oval fovea. Length, i.S mm. Missouri. 



ti-igona. 

 (Unknown to.us). 



Reddish-piceous or brown, head and prothorax brighter red, el vtra 

 piceous-black, pronotum polished, obsoletely punctured with 

 distant, ample, shallow punctures; lateral fovea; small, 

 median very conspicuous. Abdominal carinse feebly diverg- 

 ent. Length, i.i mm. Iowa. - . - . bkolor. 

 1 3 Pubescent pad linear, as long as one-third or more of the segmental 



width. 

 51 Pronotum punctured. 



Head and pronotum evenly but not densely punctured, punctures 

 varying in strength, especially in females. Lateral pronotal 

 fovete large, in full view from above; abdominal carinse 

 short, not perceptibly divergent, sometimes covered by the 

 elytra in the ^. Color, dark piceous or paler, elytra red or 

 darker, legs and antenna; red. Length, i. 0-1.2 mm. Region 

 east of the Missouri and Mississippi rivers. - puncticollis. 

 Head smooth, pronotum polished, with scattered, irregularly dis- 

 tributed, faint punctures. Lateral foveiE plainly visible from 

 above. Color invariably a uniform dull orange, or ferru- 

 ginous. Abdominal carinse moderately long. Length, 1.2 

 mm. Lowlands from Texas to Pennsylvania, not occurring 

 in the Mississippi valley. - - - - litoralis. 



Head and pronotum scarcely perceptibly punctulate, pronotal 

 lateral fovese impressed on the sides and not fully visible 

 from above. Color black, elytra, legs, antennae and palpi 

 dull red, not polished. Length, 1.3 mm. Nevada. 



nevadensis. 

 52 Pronotum decidedly impunctate. 



Forni slender with narrow shoulders, elyti'a short, abdomen long, 

 convex, highly polished, pubescence thin; abdominal carinse 

 including two-fifths of the total width, divergent. No sexual 

 marks on the antennae, i with the last two v£ntrals impres- 

 sed at base. Color dark grayish brown or piceous. Length, 

 1.2 mm. New York. ..... folita. 



E. Abdominal carinse separated by more than one-third of the segmental 



width. Antennse different in the sexes. 

 ii Frontal fovece larger than or equal to the interocular foves. 

 2^ Dark brownish red or milky coftee colored; legs commonly paler, some- 

 times darker. 



Frontal fovea very large, <^ antennse with the fourth joint widely 

 dilated, fifth to eighth small, closely united, transverse, ninth 

 and tenth nearly as wide as the last. Length 1.2 mm. 

 Southern California. ....-- sagax. 



