DIPTERA. 345 



a strangulated club, slightly geniculate in the middle, the inferior 

 portion resembling an elongated cone, and the other an oval palette. 

 The soutellum is unarmed. 



Hermetia, Lat., Fab. * 



The antennae of the others are never much longer than the head, 

 and terminate by an almost cylindrical or elongated and conical 

 joint. 



Here, the scutellum is spineless. 



Xylophagus, Mei(j., Fab., Lat,, 

 Or Xylophagus proper, where the body is narrow and elongated, 

 and the antennae are evidently somewhat longer than the head, and 

 terminated by an almost cylindrical joint. The head is short, trans- 

 versal, and without any particular elevation anteriorly. 



X. ater, Lat., Gen. Crust., et Insect., I, xvi, 9, 10. Elongated; 

 black; the mouth, a line on each side of the thorax, scutellum 

 and legs, yellow. Found in the month of May, in the wounds, 

 &c. of the Elmf. 



ACANTHOMERA, Wcig., 



Where the antennae, as long as the head at most, terminate by a 

 joint, forming an elongated cone, or almost resembling a punch, 

 and compressed, of which the first ring is larger than the others ; 

 in this respect it bears some analogy to that of Tabanus. The head 

 is hemispherical and the eyes are very large. The abdomen is broad 

 and flattened, and the interocular space presents inferiorly a projec- 

 tion in the form of a horn or pointed rostrum. The two joints of 

 the palpi are of equal length. 



In another genus 



Raphiorhynchus, JVied., 

 The first joint of these palpi is very short, and the second, much 

 longer, terminates in a point. The remaining characters are iden- 

 tical with those of Acanthomera. The species of both these genera 

 belong to South America :J:. 



There, the scutellum is armed with spines. 



In these, the antennae are simple. 



C(ENOMYiA, Lat., Meig. — Sicus, Fab. 

 They are closely allied to the two preceding subgenera. The an- 

 tennae are hardly longer than the head, with the third joint conical 

 or in the form of a punch ; the first is evidently longer than the fol- 

 lowing one. The palpi are very apparent and cylindrical, terminate 

 in a point and consist of two equal joints. The scutellum is armed 

 with two spines. 



C.ferruginea ; Sicus ferrugineus, Fab., Meig., Dipt., II, xii, 

 16, 25. Russet, with yellow or whitish spots or streaks on the 

 abdomen. It sometimes varies, the thorax being occasionally 



♦ See Lat. and Fab. 



t The same works. Meig,, Macq., family of the Xylophaei, and Wied, 



J Wied., Dipt. Exot., II, 1, 1. 



VOL. IV. A A 



