THEASYGCETJS. 467 



thorax transverse, the sides slightly rounded before the middle, the anterior angles oblique, the surface 

 with a rather deep fovea at each side, closely and finely punctured, flavous, shining, scarcely pubescent ; 

 scutellum fuscous ; elytra rather flattened, without any basal depression, .finely and rather closely punctate- 

 striate, the interstices slightly convex near the suture, the entire surface clothed with very thin yellowish 

 pubescence, the disc dark fulvous, all the margins and the base fuscous ; underside and legs flavous, 

 sparingly pubescent ; posterior tibiae with a single spur ; claws bifid. 



Hab. Mexico, Cordova {Salle). A single specimen. 



4. Thrasygoeus femoraHs. (Tab. XXVI. fig. 17.) 



Broadly oblong-ovate, fulvous below ; the base of the head, the antennae, the anterior tibiae, and a spot at the 

 apices of the posterior femora, black ; thorax flavous ; elytra dark fuscous, a subsutural and a lateral 

 longitudinal stripe fulvous, thinly clothed with yellowish pubescence. 



Length 3 lines. 



Head very finely and rugosely punctured, black ; the clypeus and the filiform palpi testaceous ; antennae more 

 than half the length of the body, black, the first joint more or less flavous, the third joint rather longer 

 than the fourth ; thorax twice as broad as long, the sides straight, the surface very slightly transversely 

 depressed near the base, flavous, clothed with thin pubescence which obscures any punctuation ; scutellum 

 fuscous ; elytra without any basal depression, closely and finely punctate-striate, dark fuscous, thinly 

 pubescent, a stripe near the sutural margin and another near the lateral one (confluent at the apex of 

 each elytron) yellowish ; apices of the posterior femora, as well as the anterior tibiae and tarsi, black ; 

 underside flavous or fulvous ; posterior tibiae with a single spur ; claws bifid. 



Edb. Guatemala, Senahu in Vera Paz {Champion). 



The ground colour of the elytral stripes is dark fulvous, but the pubescence covering 

 them is yellowish, which is the prevailing tint. 



5. Thrasygoeus scabrosus. (Tab. xxvi. figg. 18, 19.) 



Eupeges scabrosa, Clark, Cat. Halticidae, p. 109 \ 



Hab. Mexico, Orizaba, Cordova, Panistlahuaca (Salle) ; Guatemala, Zapote (Cham- 

 pion). — Brazil 1 . 



Var. Entirelv fulvous. 



As already remarked, T. scabrosus was placed by Clark in the genus Eupeges on 

 account of the supposed unarmed posterior tibise. As the reverse is the case in the type 

 before me, the species must find its place in Thrasygoeus, with which it further agrees 

 in the bifid, not appendiculate, claws. The Guatemalan specimens show no difference 

 to any appreciable extent from the type ; the base of the head in most specimens is 

 black or sometimes entirely fulvous, and rugose punctate ; the lower part of the face 

 and the thorax rufous ; the thorax is closely punctured and distinctly transversely 

 depressed near the base ; the elytra are black, clothed with very thin pubescence (in 

 the diagnosis of the genus Clark calls the elytra glabrous), and finely punctate-striate. 

 Many specimens from Guatemala are of an entirely fulvous colour, with instances of 

 darker shades ; but, as I cannot discover any other differences of importance, and being 

 from the same locality, I believe these specimens to be but a pale variety of the present 

 species. Typical and pale forms from Mexico are also before me. 



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