250 SERRICOBNIA. 



Also closely related to M. pyrenceus, and resembling it in colour, but with the head 

 entirely red. Its facies is not unlike that of Entomophthalmus, and the structural 

 resemblance is increased by the incisure of the eye in front. The male has a small 

 tubercle at the middle of the last ventral segment, and the female an indistinct oval 

 flattened space. 



7. Microrhagus marcidus. 



Cylindrical, slightly depressed, pale rufo-ferruginous, feebly shining, sparsely pubescent: antennae slender, 

 serrate, two-thirds the length of the body; head convex, not carinate or impressed, coarsely and 

 moderately closely punctate, clypeus broader at the base than the distance to the eyes, these large, entire, 

 the front between them but little wider than either eye ; thorax nearly a third wider than long, slightly 

 wider in front, sides straight, arcuate only at the front angles, a slight groove along the apical border, 

 disc convex, the posterior declivity rather flat, a small tubercle immediately in front of the middle of the 

 base, surface rather finely, not closely punctate ; elytra vaguely striate near the base, the sutural stria 

 entire, the stria3 at the apex with coarse deep punctures, intervals finely and rather sparsely punctate ; 

 propleural groove distinctly limited externally by an entire ridge, posterior inferior supplementary line 

 extending three-fourths to the apex, the propleural area internal to this line more than three times as wide 

 at the base as the groove ; metasternal episternum narrow but parallel ; abdomen finely, rather sparsely 

 punctate at the base, coarsely at the apex. 



Length 3*5 millim. 



Hab. Panama, Bugaba (Champion). 



Evidently somewhat related to M. dilutus, but with a wider thorax and differently 

 sculptured elytra. 



8. Microrhagus protractus. 



Elongate, depressed cylindrical, parallel, piceous-brown, the anterior margin of the thorax indistinctly, the 

 scutellum, base of the elytra, and suture reddish, moderately shining, sparsely fulvo-pubescent : antenna? 

 ferruginous, three-fourths the length of the body, slender, serrate ; head convex, moderately closely, not 

 coarsely punctate, clypeus much wider at the base than the distance to the eyes, these large ; thorax nearly 

 twice as wide as long, sides straight and parallel, arcuate at the front angles only, a slight groove behind 

 the apical margin, disc convex, transversely flattened in front of the base, a faint tubercle at the middle 

 of the base, surface finely and moderately closely punctate ; elytra rugosely substriate at the base, the 

 stria? at the apex with coarse deep punctures, intervals finely, rather sparsely punctate; propleural 

 groove narrow, wider in front, its outer carina entire, posterior inferior supplementary carina extending 

 nearly to the apex, the propleural area wider at the base than long ; metasternal episternum moderately 

 wide and parallel ; abdomen sparsely, finely punctate, more coarsely on the apical segment. 



Length 5-5 millim. 



Hab. Panama, Bugaba (Champion). 



This species is closely related to M. suturalis in form and colour. It differs in having 

 serrate antennae, and in the coarsely punctured strise at the apex. One male specimen. 



9. Microrhagus maculicollis. 



Oblong, parallel, depressed-cylindrical, piceous-black, opaque, sparsely pubescent, head in part yellow, thorax 

 broadly yellow at the sides : antenna? piceous-black, evidently longer than half the body (last five joints 

 wanting), third joint triangular, joints 4-6 pectinate (d 1 ), the branches longer than the joint; head 

 convex, moderately closely punctate, in great part yellow, a triangular spot at the occiput, a space around 

 the antennal fovea?, and the apex of the clypeus black, clypeus a little wider at the base than the distance 

 to the eyes, these distinctly triangularly incised in front ; thorax one third wider than long, sides straight 



