MEGISCHUS.— MONOMACHTTS. 421 



tate in the centre ; laterally bearing some large scattered punctures. Metanotum 

 shining, marked with large, widely separated punctures. Pro- and mesopleurse semi- 

 opaque, aciculated, but not strongly ; metapleurse rugose, opaque. Petiole a little 

 compressed laterally, irregularly but closely striolated, as long as the following five seg- 

 ments united, and bearing some long scattered hairs. Apical abdominal segment oblique, 

 ending above in a sharp point. Legs shining, impunctate ; hind coxse striolated, strongly 

 and distinctly so towards the apex, the inner side densely pilose, the other parts bearing 

 long scattered hairs ; tibiae and tarsi covered with a dense, shining, fulvous pubescence. 

 The anterior tooth on the hind femora is broader than the posterior one, which is not 

 one third its width, through the base not being much broader than the apex ; it is also 

 a little longer. Between the teeth the femora are waved, and behind the posterior 

 tooth are four short blunt teeth. Metatarsus more than three times the length of the 

 other joints united. Claws piceous. 



4, Megischus erythrocephalus. 



Long. 20 millim. ; terebra 21 millim. 



Eab. Panama, Buguba 800 to 1500 feet (Champion). 



Similar in coloration and clothing to M. ruficeps, but differing as follows : — The 

 hollows on the pro- and mesopleurse are reddish, and the mesonotum is obscured with 

 red at the base ; the prothorax is longer ; the mesopleurae are striolated ; the scutellum 

 has only very few punctures at the sides ; the depression at the base of the metanotum 

 is deeper ; the metanotum* is more strongly punctured ; the petiole is stouter and 

 longer than all the other segments united ; the second segment is aciculated (not 

 impunctate as in M. ruficeps) ; and the apical segment does not end in a sharp projecting 

 point. The hind femora are a little longer ; the basal tooth has not such a broad base ; 

 there are four minute teeth (placed at irregular intervals) between the basal and the 

 apical tooth, and behind the latter are three moderately sized, distinctly separated teeth, 

 and behind these again are two minute obtuse ones ; there is also a small tooth imme- 

 diately behind and touching the large tooth. The metatarsus is much thicker, and is 

 not twice the length of the other joints united. The ovipositor is shorter. 



MONOMACHUS. 



Monomachus (Klug), Westwood, Trans. Ent. Soc. Lond. 1843, p. 252. 



This genus is very distinct, and its systematic position is not easily fixed. On the 

 whole, it appears to me to come nearer Megischus than to any other described genus ; 

 although it departs widely from Megischus in the form of the antennae, head, and legs. 

 The position of the abdomen (it issuing from the point of the metathorax) separates it 



