330 



subsequilongus , simplex, intus margine albido-pube- 



scentes. 



Obs. Ut ex Walkero (Ins. Br. Dipt. II, I. c.) 

 discimus, haec species jam 1836 ab Halidayo proposita 

 est. Ita enim Borb. Suiltorum Halio. a Walkero 

 delineatur, ut inanifeste appareat non differre C. fusci- 

 pennem Zetterst. Igitur nomen ab Halidayo licturn 

 recipere fas duxi. In Britannia neque vulgaris, et co- 

 lore tarsorum varians, diserte observante Walkero. 

 Quse de Borb. punclipenni suo adfert Macquart, at 

 nimis pauca, in C. Suillorum exacte conveniunt. Obstat 

 tamen magnitudo duplo major speciei Macquartianje. 



3. C. pallifrons: nigra, nitida, subnuda; episto- 

 mate, antennis subtus, prselabro, coxis an- 

 ticis, genubus tarsisque posterioribus flavo 

 lestaceis; sela aulennarum tripla et ultra an- 

 tennae longitudine, subnuda; pedibus nigris, 

 exiliter pilosis, fernoribus anticis posticisque 

 extus modice gibbis; alis subhyalinis, parum 

 flavicantibus. tf $>. Long. ^ — £ lin. 



Mas: striga verticis apicali, orbitis fe- 

 morumque basi latius flavo-testaceis; abdomine 

 oblongo, segmentis intermediis tribus (2, 3, 4) 

 aequalibus, quinlo dimidio breviore, sexto di- 

 midiato vix exserto, sub quinto fere retracto, 

 septimo magno, curvato-inflexo, ventri appli- 

 cato, apice bifido, sub marginem quinti ven- 

 tralem inser to. 



Femina: apice verticis orbitisque obsolete, 

 basi femorum anguste flavo-ferrugineis; abdo- 

 mine ovato, segmentis quatuor (2, 3, 4, 5) sub- 

 aequalibus, apice subacuto. 



Fallen Heteromyz. p. 7. Zetterstedt Dipt. Scand. 

 VI, 2485. — Borborus pallifrons Meigen Z\v. Ins. 

 VI, 105. — Borb. pallidij rons Macqu. Buff. II, 569 (a 

 Meigeino ex descriptione Fallem, a Macquarto verbo 

 fcenus ex descriptione Meigeini transscriptus). — Borb. 



