and Central American Telephorinae. 107 



S. alhicincta, and S. ludicra are similarly coloured forms, 

 but they differ in the shape of the ^ prothorax, the first- 

 mentioned also having much larger eyes in the male. 

 S. hilamellata may be confined to the sea-coast. 



10. Silis ludicra. (Plate VIII, fig. 73, prothorax, $.) 

 Silis ludicra, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, p. 302 



Silis ludicra, var. nigroscutellaris, Pic, Le Nat. 1910, p. 44 



Hah. Mexico, Presidio in Durango [type]. 



This species was described from a single male example. 

 It is a comparatively broad, robust, rather coarsely pubes- 

 cent insect, with the pallid anterior portion of the head 

 extending angularly upwards in the middle, the prothorax, 

 the basal joints of the antennae beneath, the scutellum, 

 and the femora to near the tip, testaceous, the rest of the 

 head and the elytra, the pallid sutural and outer margins 

 excepted, nigro-fuscous or black. The antennae are 

 moderately long and stout, tapering outwards ; the eyes 

 are small ; the prothorax is wider than the elytra at the 

 base, broadl}^ excavate and bifoveate on the disc, and has 

 two broad overlapping lateral lobes, the anterior lobe 

 ciliate and curved inward, the posterior lobe extending 

 further outward, and truncate at the tip ; and the elytra 

 are comparatively short, and moderately explanate at the 

 sides. The female from Jalapa mentioned by Gorham as 

 possibly pertaining to S. ludicra is here referred to S. 

 acaritholobus, and the male from San Jose on the Guate- 

 malan coast, to S. hilamellata. Pic has described a variety 

 of S. ludicra, from Mexico, under the name nigroscutellaris — 

 " Ecusson et pattes fonces, pour le reste coloration du 

 ludicra, Gorh. Robuste, avec le prothorax fortement et 

 longuement bilobe lateralement, a lobe anterieur denti- 

 forme, posterieur subtronque au sommet." 



11. Silis albicincta. (Plate IX, figs. 74, 75, prothorax, ^.) 



Silis alhicincta, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 96, pi. 6, fig. 5 (f^) (excl. var. from Chiriqui). 



Hah. Costa Rica, Irazu [(^ ?]. 



Var. Protliorax {^) broader, the anterior lateral lobe wider, 

 rounded externally, the posterior lobe directed outwards beneath the 



