MONOCREPIDIUS. 351 



Vera Paz, Rio Naranjo, Paraiso, Zapote {Champion) ; Panama, Bugaba and Caldera in 

 Chiriqui (Champion). — Colombia 2 , Carthagena x ; Venezuela 3 . 



A very variable species. The varieties are not peculiar to any one locality, as most 

 of them have been collected together at Teapa by Mr. H. H. Smith, and at Rio Naranjo 

 and Paraiso by myself. In the palest forms the dark markings on the thorax are 

 reduced to a median vitta, abbreviated behind, and a narrow streak at the margins, 

 and those on the elytra to a subtriangular scutellar patch and an angulated post-median 

 fascia, connected or not at the suture. In the darkest specimens the thorax has only 

 the anterior and hind angles testaceous, and the elytra are entirely infuscate. In the 

 form described and figured by Candeze, and in the type of M. incommodus, the 

 elytra have a sinuous stripe on the disc extending to a little beyond the middle, 

 and an ante-apical spot, testaceous ; in many specimens the sinuous stripe is broken 

 up into two spots. 



M. incommodus, Fleut., the type of which has been communicated by its describer, 

 does not differ from M. exclamationis, Cand. ; the fourth joint of the tarsi is lamellate 

 in both. The punctuation of the thorax is exceedingly fine and close. M. exclamationis 

 may be distinguished from M. inconstans and M. vespertinus, the light-coloured varietal 

 forms of which are very similar, by the thorax being infuscate at the sides, the disc 

 with an undivided median vitta ; the genitalia of the male are also very different, the 

 outer lobes in M. exclamationis being slender and feebly curved outwards, and armed 

 on the exterior edge near the tip with one long and two short projecting points. A 

 specimen from British Honduras is figured. 



23. Monocrepidius inconstans. (Tab. XV. fig. 15.) 



Moderately elongate, feebly shining, finely pubescent ; testaceous or ferrugineo-testaceous, the head piceous or 

 fuscous, testaceous in front ; the prothorax with two spots or vittae on the anterior part of the disc, and 

 the elytra with a large subtriangular patch at the base, a common cruciform mark or patch beyond the 

 middle, and sometimes the sides anteriorly, piceous or black ; the antennae testaceous, the legs flavous. 

 Head convex, thickly, finely punctate, the frontal carina rounded and not prominent ; antennas with 

 joint 3 a little longer than 2, the two together about as long as 4. Prothorax not or scarcely as long as 

 broad, narrowed in front, the sides rounded anteriorly and sinuate behind ; the hind angles strong]y 

 produced, triangular, divergent, finely carinate at the sides above, the carina short, placed very close to 

 the margin, and confluent with it at the apex of the angle ; the surface densely, minutely punctate, with 

 intermixed slightly coarser punctures. Elytra two and one-half times the length of the prothorax, 

 narrowing from about the middle, rounded at the apex ; deeply punctate-striate, the interstices feebly 

 convex and very finely rugulose. 



Var. The prothorax with two broad vittae on the disc, extending nearly or quite to the base, and the elytra 

 entirely, fuscous or piceous. 



Length 5-7, breadth l±-2 millim. ( d 2 •) 



Hab. Mexico, Puebla {Salle), Teapa in Tabasco (H. H. Smith) ; Guatemala, Rio 

 Naranjo, Zapote (Champion). 



Seven examples. Closely resembling M. vespertinus (Fabr.), of which, at first sight, it 



