OP NATURAL HISTORY. 651 



APHODIUS Illig. 



1. A. INNEXUS. — Black; elytra with a dull yellowisli mamn. 

 Inhabits Mexico. 



Head widely emarginate before, punctured ; disk convex im- 

 punctured : antennae cinereous at tip ; palpi honey-yellow : thorax 

 punctured, excepting on the disk, anterior margin and middle . of 

 the lateral margin; margin, at the anterior angles, obsoletely dull 

 honey-yellow : scutel impunctured : elytra with impressed, very 

 regular crenate stride, exterior and terminal margins rather pale 

 honey-yellow; this color dilates towards the tip, and is deeply 

 undulated on the inner edge : feet honey -yellow. 



Length less than one-fourth of an inch. 



About the size of A. afer Fabr. 



2. A. SERVAL. — Black; elytra dull whitish, with black spots. 

 Inhabits Indiana. 



Body piceous black, punctured ; head widely emarginated before, 

 and with a dull rufous margin ; thorax with a dull rufous Jateral 

 margin : elytra yellowish white, with seven or eight subquadrate 

 black spots, and a lateral, abbreviated, black, double, confluent 

 vitta : with slender punctured strias ; interstitial lines flat, im- 

 punctured. 



Length over three-twentieths of an inch. 



Very closely allied to the imjut'nafus Fabr., and resembles also 

 A. contammatus Fabr., but the clypeus is much more deeply 

 emarginated, and is acutely angulated [178] at each end of the 

 emargination. This latter species is hairy. 



PSAMMODIUS Gyll. 



P. INTERRUPTUS.— Thorax with three lateral, transverse undu- 

 lations. 



Inhabits Indiana. 



Body dark chestnut, punctured : head deeply and somewhat 

 acutely emarginated ; with very numerous raised points : thorax 

 with about three, lateral, transverse, but little impressed grooves, 

 obsolete above; with a dorsal, longitudinal, impressed line, 

 obsolete before ; edge ciliated ; surface somewhat rough ; elytra 

 grooved, and somewhat punctured. 

 1835.] 



