244 SEEEICOENIA. 



DIAPODIUS. 



Diapodius, de Bonvouloir, Mon. des Eucnemides, p. 785 (1870). 



To this genus, represented hitherto by two species, one from Singapore and one from 

 Malacca, an insect from Chontales is referred. A comparison might show characters 

 of generic value, but from the details given by de Bonvouloir, even some that are 

 specific, there seems to be an agreement. 



l. Diapodius tricolor. 



Oblong, cylindrical, slightly narrowed behind, shining black above ; metasternurn, abdomen, and legs ferrugi- 

 nous ; pubescence sparse and inconspicuous, cinereous on the thorax and base of the elytra, black behind : 

 antenna? black, not serrate, first joint coarsely punctured and transversely strigose, third joint longer than 

 the next two ; head (seen laterally) concave, the supra-antennal ridges strongly elevated, the cavities 

 beneath large, front rather deeply impressed at the base of the clypeus, this much narrower at the base 

 than the distance to the eye, surface rather coarsely punctured, the punctures forming close transverse 

 strigae; thorax longer than wide, sides straight and parallel, apex (seen from above) nearly semicircular, 

 median line deeply impressed at the base, extending two-thirds to the apex and becoming gradually more 

 shallow, disc regularly convex, with coarse transverse strigae, which are finely punctured along their posterior 

 border ; elytra with vague traces of striae near the humeri and close to the basal margin, surface more 

 shining than the thorax, along the middle sparsely finely punctate, at the sides and base more roughly, 

 the punctures tending to form strigae .; prothorax beneath coarsely, not closely punctate, the antennal 

 groove moderately deep and smooth ; metasternurn finely punctate, the punctures forming transverse strigae ; 

 posterior coxal plates extremely finely punctured ; abdomen finely, sparsely punctured at the middle, more 

 coarsely at the sides, last segment near the apex obtusely compresso-carinate, the summit of the carina 

 obtusely spinous, the sides coarsely muricate, apex of the segment narrowly prolonged, obtuse at the tip. 



Length 14 millim. 



Hob. Nicaragua, Chontales {Belt). 



The description has been extended to enable comparison to be made with the other 

 species of Diapodius. At first glance the above species resembles a rather stout 

 Nematodes cylindricus. 



PHLEGON. 



Phlegon, Castelnau, Hist. Nat. Ins. Col. i. p. 254 (1840) ; de Bonvouloir, Mon. des Eucnemides, 



p. 746. 

 Euryptychus, Leconte, Proc. Acad. Phil. vi. p. 186. 



l. Phlegon viduus. (Tab. X. fig. 21.) 



Oblong elongate, rather feebly convex, black, opaque, sparsely pubescent: antennae black, stouter towards the 

 tip, the last three joints equal to all the preceding, excluding the first ; head densely punctured, clypeus 

 but little wider at the base than half the distance to the eye ; thorax broader than long, sides arcuately 

 narrowing to the apex, hind angles slightly divergent, disc regularly convex, a median smooth line 

 extending from the base one third towards the apex, surface densely punctured ; elytra a little wider than 

 the thorax, finely striate, intervals slightly convex, densely punctured and opaque ; body beneath opaque 

 black, densely punctured, sparsely pubescent ; legs piceous-black. 



Length 8 millim. 



Hah. Mexico, Oaxaca (H'dge) ; Guatemala, Guatemala city (Rodriguez). 



This species has quite a different facies from either of the North-American ones. It 



