70 ()ithorrha])ha hiachycera. 



Of Xylophagids Zetterstedt (I, 1842) has recorded X. uter from 

 Deiiinark, sent to liirn by Stæger, and Schiødte (Nat. Tidsskr. IV. 184^-48) 

 coininunicates Drewsens observation on the laiva oi X.ater. Tluis only 

 one Xylopliagid was know n, while now two have been found in Denmark. 



I have here retained Xtjlophdgns and Xylonnjia in the family 

 Xylophagidæ. Not that 1 am convinced witli regard to tlie natural 

 formation of the family; Osten Sacken (Berl. Ent. Zeitschr. XXVI, 1882. 

 365) has divided the family and drawn Xylomyki to the Beridinae. 

 and Xi/lopha(/i(s together witii Coenoniyiii to the Leptididae. The author 

 gives several reasons for this arrangement, and the larva of Xylomyia 

 also much resembles those of certain Stratiomyids botii in structure 

 and mode of pupation. Austen (Ann. Mag. Nat. Hist. 7, III, liSUlJ, 187) 

 follovvs Osten Sacken, and perhaps this may be right, but yet the 

 question cannot at this time be considored as solved. 



Tahle of Genera. 



1. l'^irst joint of antennæ much longer than the second: 



all tibiæ with apical spius ; fourth posterior cell open . . 1 . Xylophugus. 



— First and second joint of antenna' almost of equal length ; 

 front tibiæ withoiit apical spurs ; fourtli posterior cell 

 closed 2. Xylomyia. 



1. Xylopliagus Meig. 



Species of middle or somewhal large size of chiefly black colour. 

 Head semiglobular, broader than high, as broad as the thorax, flat or 

 slightly arched behind. Yowls narrow, not descending below the eyes, 

 liorizontal; epistoma retreating. Antennæ inserted slightly above the 

 middle of the head, ten-jointed, the first basal joint long, the second 

 short, the third somewhat longer, the rest short. Eyes bare, separated 

 in botli sexcs. mostly so in Ihe female. Front and vcrtex somewhat 

 depressed, thus the eyes slightly prominent. Tlie inembrane connecting 

 the mouth parts with the niouth edge small and a distinct oral cone 

 not formed; clypeus broad. weakly chitinised, partly membranous: 

 proboscis short: labrum of the length of labium. slightly semitubular; 

 hypopharynx a little sliorter: Ihe maxillæ have a long. narrow lacinia. 

 somewhat curvcd towards the apex, and two-jointed palpi: in the 

 female the second joint is broad, somewhat compressed and pointed, 

 in the male it is smaller; the labella are broad, protruding somewhat 

 forwards. The thorax is longer than broad. Abdomen elongate. con- 

 sisting of seven segments, in the male with parallel sides, Inmcate at 

 the apex, the genitalia forming a knoblike part; in the female the 

 abdomen is broadest al the middle, tapering towards the apex. ending 



