344 SEEEICORNIA. 



occurs in company with the variety at numerous localities. M. flavangulus may be 

 known from all its allies by having the fifth ventral segment mucronate in the middle 

 at the apex ; the mucro is variable in length, it being short in some specimens of the 

 var. vittatus. The elytra are obliquely truncate at the apex, with the sutural and outer 

 angles obsoletely mucronate. We figure a male of the var. vittatus, from Jalapa. 



5. Monocrepidius pruinosus. 



Elongate, convex, rather narrow, pitchy-black, the hind angles of the profchorax obscure testaceous, thickly 

 clothed with very short, fine, greyish pubescence, the antennae and palpi rufo-testaceous, the legs flavo- 

 testaceous. Head thickly, finely punctate, foveate on either side before the eyes, slightly declivous in 

 front, the frontal carina broadly truncate ; antennae nearly half the length of the body, joint 3 about 

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

 wider at the middle than at the base ; the sides moderately rounded, sinuate behind, and converging at 

 the apex ; the hind angles strongly produced, slightly divergent, carinate at the sides above, and with a 

 very short, faint, oblique carina at the tip ; the surface densely, finely, uniformly punctate, and obsoletely 

 canaliculate down the middle. Elytra a little more than twice the length of the prothorax, and equalling 

 it in width, parallel to the middle and rapidly narrowing thence to the apex, the apices feebly, obliquely 

 emarginate ; deeply and rather coarsely punctate-striate, the interstices convex and finely rugulose. Eifth 

 ventral segment obsoletely mucronate in the middle at the apex. Eourth tarsal joint rather broadly 

 lamellate beneath. 



Length 10|, breadth 2§ millim. 



Hab. Mexico, Eio Papagaio in Guerrero (H. H. Smith). 



One specimen, apparently a female. Allied to M. flavangulus ; but much smaller 



and narrower, the elytra less elongate and more deeply punctate-striate, the thorax 



more rounded at the sides, the fifth ventral segment obsoletely mucronate. The 

 pubescence is very short. 



6. Monocrepidius lMduS. (Tab. XV. fig. 8, genitalia, s .) 



Elater lividus, De Geer, Mem. des Ins. iv. p. 162, t. 18. fig. 4 (1774) \ 



Monocrepidius lividus, Lee. Trans. Am. Phil. Soc. x. p. 482 2 ; Cand. Monogr. Elat. ii. p. 244 3 ; 



Fleut. & Salle, Ann. Soc. Ent. Ft. 1889, p. 411 4 . 

 Elater castanipes, Herbst, K'afer, x. p. 23, t. 160. fig. 5 5 . 

 Elater elongatus, Palis, de Beauv. Ins. Afr. et Amer. p. 78, t. 8. fig. 4 6 . 

 Monocrepidius elongatus, Chevr. Ann. Soc. Ent. Fr. 1852, p. 630 7 . 

 Elater lobatus, Say, Journ. Acad. Phil. iii. p. 175 8 ; Trans. Am. Phil. Soc. vi. p. 174 9 ; Complete 



Writings, ii. pp. 114, 610 10 . 

 Monocrepidius lobatus, Germ. Zeitschr. fur Ent. i. p. 228 ". 

 ? Elater flavipes, Oliv. Ent. ii. no. 31, p. 30, t. 2. fig. 17 12 . 



Hab. Noeth America 5 u 12 , Pennsylvania x 8 , Middle and Southern States 2 3 , 

 Western States 8 . — Mexico 3 , Etla, Cordova, Oaxaca (Salle), Jalapa {Edge, M. Trujillo), 

 Orizaba (coll. Janson). — Antilles 3 , San Domingo 6 , Guadeloupe 4 . 



Sent in abundance by Herr Hoge from Jalapa. The antennae are a little more 

 elongate in the males than in the females. 



