The PsELAPHIDyE OF NoRTH AMERICA. 269 



2^ Pronotum inipunctate. 



Abdominal carinas long, color ferruginous, <J last ventral concave, 

 with a median longitudinal elevation. Length, 1.5 mm. 

 Illinois. - ....... radians. 



Abdominal carinaj short, elvtra pi^ctured, color piceous, antennae 

 and legs yellowish-red. Length, 1.2 mm. Massachusetts. 



divcrgens. 



Abdominal carinie somewhat farther apart, not very short, median 



fovea of pronotum very small, occiput slightly impressed in 



the middle. Color ferruginous. Length, 1.3 mm. Florida, 



South Carolina near the coast. - - - atlantica. 



I* Pubescent pad at the base between the abdominal carinas transverse, not 



broader than one-fifth of the abdominal width. 

 31 Pubescence very long, pronotum and elytra longitudinally ver}' convex, 

 nearly gibbous, median fovea very small. 



Prothorax not punctured, abdominal carina? very long, parallel, 

 slightly divergent at the end and fully one-fifth of the abdom- 

 inal width apart. Length, 1.33 mm. Louisiana, Illinois, 

 Iowa. ........ gracilis. 



Varieties of this species from Louisiana, with traces of punctures 

 on the pronotum, are called gracilicornis^ Casey. Others from 

 Iowa, with shorter carinte, constitute the typical gracilis. 

 3^ Pubescence short, pronotum and el}tra normal, not so convex. 

 4I Pronotum decidedly punctate. 



Head and pronotum with closely placed, large, deep punctures, 

 abdominal carinre including one-fifth of the segmental width. 

 Color black, elytra piceous, legs yellow. Length, i.o mm. 

 New York, Long Island. . . - . . scabra. 

 Head punctulate, pronotum polished, with deep, evenly-distrib- 

 uted, abundant punctures; abdominal carinse long, parallel, 

 ^ slightly divergent posteriorly, including one-fifth of the 



abdominal width. Length, 1.5 mm. Illinois, Iowa. 



cribricollis. 

 (Varies slightly in the strength of puncture). 

 4^ Head and pronotum impunctate, or with a few irregular, minute punc- 

 tures. Abdominal carina; divergent from the base onward. 



Pale ferruginous or lighter, abdominal carinje including one-sixth 

 of the abdominal width. Length, 0.9 mm. New York. Vir- 

 ginia. - - -...-. congener. 

 Piceous-black or dark-brown, with red or darker elytra, legs and 

 antennje yellowish-red or brown. Abdominal carin?e includ- 

 ing from one-sixth to one-fifth of the segmental width, 

 strongly divergent, disk of pronotum and elytra with a few 

 minute, scattered punctures, or impunctate. Pubescence 

 short, suberect. Length, 1.2- 1.4 mm. Atlantic region, 

 Illinois, Kansas. rtibicunda. 



