1854.] 39 



sinuate ; the striae are deep and moderately punctured, the intervals are narrow, 

 convex, and are each marked with a row of very fine punctures, from which pro- 

 ceed very short hairs. 



The legs are moderately long, the anterior tibiae scarcely dilated at the apex, 

 with the emargination extending nearly to the middle ; in the male the first three 

 joints of the anterior tarsi are very slightly dilated, and furnished beneath with 

 a few papilla3. The antennas are very slightly thickened externally ; the first 

 three joints and the base of the fourth are smooth, but furnished with a few scat- 

 tered hairs ; the first is longer than the third, and somewhat thicker than in the 

 other genera of this group. The paraglossae are narrow, curved, and longer than 

 the truncate ligula ; the tooth in the emargination of the mentum is moderately 

 large, and almost acute at the tip. The palpi are slender and moderately long ; 

 the last joint is elongate oval, and almost acute at the tip; that of the maxillary 

 palpi is distinctly longer than the penultimate joint. 



It seems by its characters closely to approach Stomis, but the mandibles are not 

 so long and the labrum is not at all emarginate. By the structure of the anterior 

 tibiae as well as by the sexual characters, it evidently belongs to the* present 

 group. 



1. A. pus il 1 us, niger, nitidus, parce breviter pubescens, capite parce punc- 

 tato, thorace latitudine longiore, convexo, cordato, postice constricto, angulis 

 posticis rectis, disco obsoletius basi et apice distinctius punctatis, elytris thorace 

 duplo latioribus oblongis convexis, profunde striatis interstitiis convexis uniseri- 

 atim punctulatis, piceis lateribus late rufescentibus, antennis palpis, pedibusque 

 rufis. Long. '25. 



* Stomis americanns Lap.' Lee. Ann. Lye. 4, 356. 



Platynus pusillus\. Harris, MSS. 



Massachusutts, Dr. Harris; Illinois, Mr.Willcox. Finding in this insect many 

 of the characters of Stomis, I was misled by the very poor description of Mr. 

 Laporte, (Etudes Entom. 1, 72) with which it agrees as closely as could be ex- 

 pected, in every respect except size. Baron Chaudoir, as I have already ob- 

 served in my synopsis of Pterostichus, (Journ. Acad. Nat. Sc, 2d ser., 2,) has 

 since stated that Mr. Laporte's insect is Feronia fastidita Dej. Under these 

 circumstances, the specific name adopted by me under error falls, and I take 

 pleasure in giving to the insect the name under which it was communicated to 

 me by Dr. Harris. 



Rhadine Lee. 



This genus only differs essentially from Platynus by the greater length of the 

 third joint of the antennae, which is one half longer than the fourth joint ; the 

 first joint is short, being about one-half longer than the second. The form of body 

 is that of the first division of Platynus, but the margins of the thorax and elytra 

 are more broadly rerlexed, and the elytra are strongly sinuate at the apex ; the 

 antennas and feet are also longer. These characters give the insect a considerable 

 resemblance, in general appearance, to Anophthalmia. 



1. R. larva lis, pallide rufo-picea, nitida, thorace cordato-ovali, postice 

 valde angustato, valde reflexo-marginato, angulis posticis rectis, elytris fere ellip- 

 ticis, dorso planiusculis, fortiter marginatis, apice sinuatis, obsolete striatis, sub- 

 tiliter tripunctatis. Long. "41. 



Le Conte, Ann. Lye. 4, 219. 



One specimen (male) found near St. Louis, Missouri, was kindly given my by 

 Dr. Engelmann. In the State of Ohio, Dr. Schaum procured a dark brownish 

 black specimen, in which the sinus of the elytra was so strong, as to form on 

 each side of the apex a tooth; the specimen was a female, but not having it be- 

 fore me for examination, I cannot determine whether the difference is to be re- 

 garded as sexual or specific, 



Platynus Bon. (emend. Brulle.) 

 Under this generic name I group, after the example of Mr. Brulle, those spe- 



