XYLOPIIAGUS. 33 



incumbent, parallel. Alulae small. Halteres uncovered. Abdomen 

 with 7 segments. Legs simple, bare. 



Male. Eyes almost contiguous. 



Tem. Eyes remote. Anal segments tubular. 



The species are few, and of rare occui'rence. The larvse live 

 in decayed wood. The flies appear in the summer, and rest on 

 the trunks of trees, and are sluggish except in fine calm weather. 



(longer than the second : Palpi clavate .... 1. XYLOPfUGirs. 

 as long as the second : Palpi cylindrical ... 2. Subula. 



Genus I. XYLOPHAGUS. 



Xylophagus, Mq. i. 229 (1834). Adlus p., Sib. Emp'a p., Pz. 

 RJiagio p., Pz. Xylojjhacjiis p., Mg. ; Fb. ; LI. ; Ztt. 



Palpi biarticulati, clavati. Antennae subflliformes ; articnlus primua 

 secundo longior. Alai'um vense 4 longitudinales, pra-ter areolam 

 analem acutam in marginem interiorem aire descendentes. Tibiae 

 apice spinosa3. 



Body naiTow, cyhndrical, thinly clothed with short hairs. Colour 

 black, often partly red or yellow. Head depressed. Eyes prominent. 

 Labrum short, thick, with an obtuse tip, shorter than the labium. 

 Palpi biarticulate, clavate, longer than the labium, curved up^\ ard ; 

 first joint very small ; second lar(/e, oval, pubescent. Labium short, 

 cyhndrical. Antennae subfihform, 10-jointed, porrect, approximate, 

 diverghig ; first joint longer than the second, cyhndrical ; second 

 cyatliiform, short ; third and foUowing joints forming a long almost 

 cyhndrical flagellum. Scutelhmi semicircular. Alidae enthe, very 

 small. Halteres uncovered. Abdomen rather long. Tibiae armed 

 with spines at the tips. 



Male. Abdomen cyhuchical. 



Feni. Abdomen obconical, with a tubular-jointed oviduct. 



1. ater, Fb. s. a. 64. 1 (1805); Mg. ; Mq. ; Z\i. —subulata, Pz. ! 

 fn. L. iv. 23. Niger, thorace chiereo-trivittato, alls fusco-fasciatis, 

 pedibus fulvis, femoribus posticis apice tibus tarsisquc fuscis. Long. 

 hn. 6 ; alar. 10 hn. 



Black, shining. First joint of the palpi yehow. Antennae a little 

 shorter than the thorax. Thorax with three grey stripes. An inchs- 

 tinct brown band across each wing. Halteres yeUow. Legs tawnv ; 

 hind tibiae, hind tarsi, and tips of the hind femora Ijrown. 



Very rare. In Mr. E. Brown's collection. (E.) 



VOL. I. 



