HETEKODERES. 357 



Monocrepidius suturalis, Lee. (=JEolus rufulus, Cand.), M. sordidus, Lee, and 

 M. robustus, Horn, belong to it. 



Fourth joint of the tarsi rather broadly lamellate beneath ; the under surface 



with intermixed coarse punctures sordidus. 



Body broad ; the coarse punctures on the prothorax somewhat closely placed. 

 Body narrow ; the coarse punctures on the prothorax more scattered . . heterostixus. 

 Fourth joint of the tarsi very narrowly lamellate beneath. 



Under surface without intermixed coarse punctures; elytra elongate; 



length 8-9 millim granulatus. 



Under surface with intermixed coarse punctures ; elytra short ; length 



3 millim . gibbulus. 



1. Heteroderes sordidus. 



Monocrepidius sordidus, Lee. Trans. Am. Phil. Soc. x. p. 482 * ; Cand. Monogr. Elat. ii. p. 271 2 ; 



Horn, Trans. Am. Ent. Soc. iii. p. 312 3 . 

 Heteroderes lantus, Cand. Ann. Soc. Ent. Belg. 1889, p. 97 (Elat. Nouv. iv. p. 31) \ 



Hab. North America, Florida 4 , Arizona, Gila Kiver 12 . — Mexico, Northern Sonora 

 (Morrison). 



Sent in numbers by Morrison from Sonora. The very fine interstitial punctuation of 

 the thorax is not mentioned by Leconte ; it is, however, noticed by Dr. Horn 3 . I have 

 examined a specimen of H. lantus communicated by Dr. Candeze, and also various 

 examples of M. sordidus, Lee, received from Dr. Horn ; they belong to one species. 



2. Heteroderes heterostixus. 



Heteroderes heterostixus, Cand. Ann. Soc. Ent. Belg. 1889, p. 96 (Elat. Nouv. iv. p. 30) \ 



Elongate, moderately convex, slightly shining ; brown or blackish-brown, the hind angles of the prothorax and 

 the antennae testaceous, the legs and palpi flavous ; the upper surface thickly clothed with a very fine, 

 pruinose, appressed, yellowish-cinereous pubescence, with intermixed semierect hairs ; the under surface 

 finely pubescent. Head sparsely, rather coarsely punctate, the interspaces with exceedingly minute 

 punctures ; the frontal carina prominent, subtruncate at the middle ; antenna? moderately long, joint 3 

 twice as long as 2, the two together a little longer than 4. Prothorax slightly longer than broad, 

 narrowed in front, the sides rounded from the middle forwards and strongly sinuate behind ; the hind 

 angles strongly, acutely produced, divergent, finely carinate at the sides above, the carina short and 

 joining the marginal one at the tip ; the surface sparsely, rather coarsely punctate, the interspaces with 

 exceedingly minute punctures, obsoletely grooved down the middle. Elytra about two and one-third 

 times the length of the prothorax, narrowing from the middle, rounded at the apex ; deeply punctate- 

 striate, the punctures very distinct throughout ; the interstices convex, closely and exceedingly minutely 

 punctate, with widely scattered coarser punctures. Beneath densely, exceedingly minutely punctate, 

 with intermixed coarse punctures. Posterior coxal plates very broadly widened inwards. Fourth tarsal 

 joint strongly lamellate beneath. 

 Length 6£-8£, breadth l§-2§ millim. 



Hab. Mexico, Play a Vicente in Vera Cruz (Edge), Teapa in Tabasco (Pilate, 

 H. H. Smith) ; Guatemala \ San Juan in Vera Paz, Guatemala city (Champion). 



