TRIMOEUS— PAEAMESIUS. 437 



Head roughly punctured all over ; thorax covered with shallow large punctures, which 

 are stronger on the scutellum ; the base of the abdomen strongly striated, the striations 

 continued to the middle of the end of the third segment, but becoming very much 

 finer and closer ; the rest of the abdomen coarsely punctured. Mandibles large, acute, 

 projecting. Antennae with the second joint thicker and a very little shorter than the third, 

 the latter double the length of the fourth ; the other joints are twice as broad as long, 

 and almost double the breadth of the scape ; the scape and the base of the flagellum 

 are more or less obscure testaceous. The collar is more or less blackish close to the 

 head and legs. Scutellum sharply raised from the scutum all round ; the base rounded, 

 as is also the top ; at the apex it is more truncated, and bears a well-defined keel and 

 has an inward slope. Metanotum large, flat, the sides straight, projecting at the outer 

 edges into a blunt tooth and retreating from there to the centre (so that the apex is 

 semicircular), and with a border all round. On the postscutellum are two large stout 

 black teeth, joined at the base. Mesopleura hollow, striated. Mesonotal sutures wide, 

 shallow, somewhat canaliculated. 



The abdomen in the typical Trimorus is said to be rather long ; but this is not the 

 case with the present species, in which it is only a little longer than the head and thorax 

 together. 



Subfam. BIAPRINM 



The European forms only of this small subfamily have been studied to any appreci- 

 able extent, the American species being scarcely known. 



PAEAMESIUS. 



Paramesius, Westwood, Lond. & Edinb. Phil. Mag. i. p. 129 (1832). 



Paramesius will, no doubt, prove to be numerous in species when more attention has 

 been paid to the genus. It has not hitherto been recorded from beyond Europe. 



A. Postscutellum bearing a thick curved spine; third joint of the antennas at least jhree 

 times the length of the second; vertex raised, separated by furrows from the sides. 



l. Paramesius fasciatipennis. (Tab. XVHI. fig. 18, $ .) 



Niger, pedibus piceo-rufis ; petiolo quam segmentum 2 m fere longiore ; alis fumatis, albo-fasciatis. c? $ . 

 Long. 6-7 millim. 



Hab. Panama, Bugaba, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



Antennae pilose ; second joint about one third of the length of the third, the latter a 

 little longer than the fourth, the fifth shorter than the preceding, the sixth distinctly 

 longer than broad, the seventh thicker and scarcely longer than broad ; the remaining 

 joints much thicker, broader than long ; the apical joint conical and thinner, if any- 



