INSECTA. 337 



The name Xylophagus is, according to the observations of DREWSEN, 

 unsuitable, for the larvae do not feed on wood, but suck those of Tipula and 

 PyrocJiroa, which have the same habitat (old trunks of trees). KROYER'S 

 Tidsskr. iv. p. 103. 



Note. Here is to be referred genus Pachystomus LATH., with five 

 joints of antennae, the last three conjoined. LATKEILLE Gen. Crustac. 

 et Insector. iv. pp. 286, 287. 



Subula MEGEELE, WESTW. (spec, of Xylophagus MEIGEN). First 

 joint of antennae short. 



(A genus differing from the preceding in the metamorphosis, according to 

 the observations of KOSER, HOPE and others ; comp. WESTWOOD Introduct. 

 n. p. 534). 



Beris LATE. Scutellum armed with four, six or eight spines. 

 Sp. Beris clavipes PANZER, Deutschl. Ins. Heft 9, no. 19, &c. 



Acanthomera WEIDEM. 

 Raphiorhynchus WIEDEM. 



(This genus with Acanthomera is placed by MACQUART amongst the 

 Tdbanii.} 



ft Antennae longer than head. 



a) Antennae simple. 



CypJwmyia WIED. Scutellum bidentate. 



Sp. Cyphomia auriflamma WIEDEM., GUERIN Iconogr., Ins. PI. 98, fig. 5. 

 Habit, in Brazil. All the species are American ; the habitus is that of 

 Stratiomys, from which genus they seem to differ by artificial character 

 alone. 



Hermetia LATR. Last joint of antennae oval, elongate, set upon 

 ;he constricted apex of the preceding. Scutellum unarmed, 



Species all exotic, mostly American. 



b) Antennae flabellate. 



Ptilocera WiEDEMANN. 



Sp. Ptilocera qnadridentata, Stratiomys quadridentata FABR., WIEDEMANN 

 Aussereurop. zweifl. Ins. n. p. 59. Tab. vm. fig. 4. Habit, in islands 

 Sumatra and Java. 



B. Antennae with joints not more than eight, with long seta 

 terminal or near the apex. 



Sargus FABR., MEIG. (Sargus and Chrysomyia MACQ.) Antennae 

 with last joint orbicular or elliptic. Scutellum unarmed. Wings 

 lanceolate, longer than abdomen. 



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