AT^ENITTS. 95 



Paraiso, Paso Antonio {Champion); Nicaragua, Chontales (Janson); Panama, Bugaba 

 (Champion). 



Var. A. castaniellus. Oblongus, convexus, potius subcylindricus, castaneo-rufus ; thorace punctis magnis paucis 

 antice et lateribus late dispersis, antice subtilissime punctulatis, angulis posticis <$ obtusis, § rotundatis ; 

 elyfcris profuudius striatis, interstitiis minus crenatis, striis apice profundioribus fundo cancellatis, inter- 

 stitiis plus minusve subtilissime punctulatis; abdoniine medio c? sparsim punctulato, $ lsevi, lateribus 

 grosse pauciter punctatis ; mesosteruo carina elongata vel nulla. 



Long. 4 millim. 



Edb. Guatemala, Zapote, San Geronimo (Champion). 



Notwithstanding its distinct facies A. castaniellus cannot be regarded as more than 

 a variety of A. liogaster, examples intermediate in one or other of its characters 

 being found in the same localities. 



I have some hesitation in separating A. liogaster from A. strigatus (Say), in which 

 also the sexes differ in the form of the hind angles of the thorax ; but on comparing a 

 large series with the numerous examples of A. strigatus before me (including several from 

 Texas and more northerly localities), it shows a constant difference in its rather smaller 

 size, deeper elytral striae and more convex interstices, and smoother ventral segments. 

 The sculpture of the head and thorax varies considerably, but preserves the same 

 general character, the punctuation on the thorax being always sparser than in A. crihri- 

 thorax, larger and smaller punctures being intermingled, and spaces on the sides and 

 sometimes near the base being quite smooth. The humeral callus and sides of the 

 elytra are also quite free from punctures. 



3. Atsenius cribrithorax. 



A. Uogastri simillimus, sed differt ventro crebrepunctato ; ab A. strigato differt statura minore, thoraee crebrius, 

 lateribus (prsecipue apud tf ) confluenter, punctato elytrisque callo bumerali interstitiisque versus latera et 

 apicem punctulatis. 

 cJ . Thoracis angulis posticis distinctis basique juxta angulum utrinque leviter sinuato. 

 <j? ?. Thoracis angulis posticis obtusis, subrotundati3, sculpturaque sparsiore, elytrorum lateribus minus 



punctulatis. 

 Long. 3±-4| millim. 



Hob. Mexico, Cordova (Salle, Edge), Jalapa (Edge) ; Guatemala (Salle), near the 

 city (Salvin, Champion), El Reposo, Coatepeque, Zapote, Capetillo, Duenas, Balheu, 

 Chiacam, Cubilguitz, Tamahu, Sinanja, San Geronimo (Champion) ; Nicaragua, 

 Chontales (Janson) ; Panama, Volcan de Chiriqui, San Lorenzo, Los Eemedios 

 (Champion). 



In the punctured interstices at the sides and apex of the elytra, this species agrees 

 with Von Harold's description of A. stereorator (Fabr.) ; but I have not seen any 

 examples from Brazil, which country he includes in the range of his A. stereorator, 

 and there can be little doubt that his description refers to a rather larger species, 

 described further on as A. strigicauda. Among the very numerous examples I have 



