28 EEOTTLIDJE. 



A widely distributed and variable species, of which we may distinguish five 

 varieties : — 



a. Greenish-black, the underside, head, thorax (excepting a broadish vitta and the 

 lateral margins), and a more or less extended stripe from the base of elytra, ferruginous- 

 red. [L. scapularis, Chevr.] 



/3. Like a, but with the head vittate also. 



y. Head and thorax (the lateral margins excepted), the underside, and the base of the 

 legs, red, the elytra wholly black. 



8. Brownish-red, the thoracic vitta and margins, and the tip of the elytra blackish, 

 the antennae black. 



e. Almost entirely black, and broader than the preceding forms. [Langurites 

 ventralis, Crotch, nee Chevr.] 



In the synonymy I have followed Crotch ; the various varieties look as if more species 

 might be detected among them ; var. e, especially, looks distinct. 



The sexual characters have not hitherto been noticed. In the male the apical ventral 

 segment is very coarsely punctate and hairy, and has a roundish excision ; the front 

 tarsi are very little dilated and not very hairy ; the front femora are rather more incras- 

 sate in the male sex, all the femora being somewhat clavate in both sexes. 



This is one of the best known of the American Languriides, it being contained in 

 all collections of this group. It appears at first sight very improbable that the very 

 narrow forms are conspecific with the broad form of var. e ; but varieties occur quite 

 intermedial, and of all kinds of differences in colouring. 



CROTCHIA. 



Crotchia, Fowler, Trans. Ent. Soc. Lond. 1886, p. 305. 



This genus has been described at great length by Mr. Fowler ; this author including 

 in it six species from Colombia and Brazil. These species are very nearly allied to 

 some of those now described from Central America ; the eyes, however, are often larger, 

 and the tarsi of the males more hairy and wider. The characters now given are identical, 

 but condensed, and rendered comparative with the generic diagnoses of this family in 

 the present work : — Body convex and gibbous, constricted at the junction of the thorax 

 and elytra. Head with margined sockets for the antennae ; the ocular canthus margined 

 by a straight raised line above, but there is scarcely any striola ; epistoma imperfectly 

 divided by a vague depression; crown with a double stridulating file. Eyes very 

 prominent, large, and coarsely granulate. Antennae with a three-jointed club. Pro- 

 sternal process rather broad and truncate, the centre impressed, and the margin 

 thickened on each side. Mesosternum deeply excised behind. Legs short and very 

 stout ; front tibiae angular externally, being compressed but cut out on their outer side 

 immediately above the tarsi ; tarsi, especially the front pair of the males, wide and very 



