612 Mr. W. Scliaus on 



mouth, thin and scale-like, blunt at the extremity, with a 

 strong molar tooth at the base. The maxilla has a long 

 fleshy outer lobe and the inner lobe is strongly chitinized and 

 furnished with a double row of extremely long and sharp 

 teeth. The mentum is quadrate, with a terminal fringe of 

 long hairs, and the ligula prominent and bilobed. 



There is no stridulatory apparatus such as characterizes 

 the Orphninse, Ochodseinee, and Idiostoininse. 



The specimen I have dissected is a male, but I have found 

 no external sexual distinction. The species is from the 

 AVhite Nile and is at present without a name. It is ex- 

 tremely close to Dynamopus pUcifrons, Fairm., from Senegal, 

 of which I have seen the type in M. Rene Oberthiir's 

 collection, but differs in having the pronotum more coarsely 

 and less densely punctured. Dynamopus athleta, Sera., of 

 Western Asia, is a rather smaller and relatively shorter 

 insect. 



The new species is shortly diagnosed as follows : — 



Dynamopus semenowi, sp. n. 



Lsete rufo-testaceus, capite prothoracisque disco brunneis, capite 

 omnino grosse rugoso ; prothorace lato, grosse punctate, punctis 

 autice confluentibus, postice discretis, lateraliter sparsis, disco 

 postice laevissime impresso, lateribus fortiter arcuatis, awgulis 

 posticis nuUis ; scutello laevi ; elytris profunda a;qualiter 

 punctato-striatis, interstitiis sparsissime punctatis. 



Long. 9 mm,, lat. max. 5 mm. 



Hob. White Nile. 



The specimens in the British Museum were collected 

 many years ago by Mr. Petherick. The species is also con- 

 tained in Herr Carl Felsche^'s collection. 



LXXIII. — New Species of Heterocera from Costa 

 Eica.—YllL By W. Schaus, F.Z.S. 



Syntomidse. 



Euagra delectans^ sp. n. 



(J. Palpi red on basal half, the apical half brown; frons 



buff; vertex and neck crimson; collar and thorax black, 



streaked with dark blue ; abdomen above blue-black, ven- 



trally white ; fore coxas white. Fore wings black, tinged 



