LIMONIUS. 455 



Group ATHOINI. 



LIMONIUS. 



Limonius, Eschsclioltz, in Thon'a Archiv, ii. 1, p. 33 (1829) ; Candeze, Monogr. Elat. iii. p. 377. 

 Gambrinus, Leconte, Trans. Am. Phil. Soc. new ser. x. p. 435 (1853). 

 Pheletes, Kiesenwetter, Naturg. Ins. Deutschl. iv. p. 329 (1858). 



A holarctic genus containing fifty-two described species, thirty-three of which are 

 American, one only of these being from our region, whence a second is now added. 



1. Limonius quadraticollis. 



Limonius quadraticollis, Cand. Monogr. Elat. iii. p. 412,, t. 5. fig. 10 \ 



Hab. Mexico, Cordova and Tuxtla (Salle l ), Jalapa and Playa Vicente (H'dge). 



Not uncommon in the State of Vera Cruz, whence we have received a good series 

 of both sexes. These specimens vary from 7-J— 11 millim. in length. L. quadraticollis 

 has the basal joint of the tarsi a little more elongate than usual in the genus. 



2. Limonius longulus. (Tab. XX. fig. 8, 6 , var.) 



Elongate, narrow ( J ), or moderately broad ( 2 ), subopaque ; pioeous, tbe prothorax with the anterior angles 

 or the sides slightly rnfescent, the antennae black ; thickly clothed with long cinereous hairs, which on 

 the upper surface are partly decumbent and partly semierect. Head densely, rather coarsely punctate ; 

 the front depressed in the middle, rounded and prominent on either side, the carina obliterated in the 

 centre ; antennae rather more than half the length of the body in the male, extending very little beyond 

 the hind angles of the prothorax in the female, the joints from the fourth considerably widened, becoming 

 longer and narrower outwards in the male, joint 3 small, slightly longer than 2. Prothorax almost square, 

 feebly sinuate at the sides behind ; the anterior angles somewhat broadly rounded and produced in front ; 

 the hind angles short, subacute, not carinate ; the surface densely, rather coarsely punctate ; the basal 

 median lobe extending as far backwards as the hind angles. Elytra about three and one-fourth times 

 the length of the prothorax, and much wider than it, flattened on the disc, very gradually narrowing from 

 the base in the male, much broader and widest beyond the middle in female ; coarsely punctate- striate, 

 the striae shallow, the interstices flat and densely, rather coarsely punctate. Beneath closely, moderately 

 coarsely punctate. The basal joint of the hind tarsi a little longer than the second. 



Var. The pronotum and propleurae entirely rufous. 



Length 7-8|, breadth lg-2| millim. ( J $ .) 



Hab. Mexico, Juquila in Oaxaca (Salle). 



Three males and one female, one of the males belonging to the variety. Allied to 

 L. quadraticollis, which also has the anterior angles of the thorax rounded and con- 

 siderably produced in front ; but differing from it in the dense punctuation of the 

 upper surface, the coarser pubescence, the non-carinate hind angles of the thorax, the 

 flatter elytra, &c. The males are much narrower than the same sex of that species, 

 with longer and stouter antennae, and the elytra gradually narrowing from the base. 

 The female is much broader than the male, with the elytra widening to beyond the 

 middle, the front less prominent, and the antenna? short. 



