222 Mr. J. O. Westwood's Descriptions 



noto (subtus basin abdominis) magis rufescentibus et valde 

 sericantibus. Abdomen nigrum, lateraliter magis piceum. 

 Pedes 4 antici nigri, geniculis piceis, 2 postici coxis laete 

 castaneis ; femoribus in medio obscure rufis ; tibiis nigris, 

 parum clavatis, tarsorum articulis duobus basalibus dilatatis 

 depressis albis, lmi basi nigro, tertio mediocri, nigro basi albo. 

 Alae hyalinae, venis nigris, stigmate fusco. 



Fcenus rufus, Westw. Monogr. Sp. 15. 



Individua duo fceminea hujus speciei, ut videtur, vidi, mesono- 

 tum macula parva media notatum babentia, nee non striolam 

 nigram dorsalem abdominalem, oviductum e quarta parte ab- 

 domine breviorem, antennas graciles ejusdem longitudinis, 

 faciem sericantem in medio parum carinatam, et tibias pos- 

 ticas mediocriter clavatas. 



Long. corp. lin. 7g, oviduct, lin. 4. Expans. alar, antic, lin. 9. 



Habitat prope Adelaida, Australasia. In Mus. Smith and 

 Westwood. 



Genus Aulacus. 



M. Brulle (Hist. Nat. Inst. Hym. iv. 343) states that he has 

 found the ungues of the tarsi small and simple in botb sexes of 

 A. striatus, with the pulvillus large, whilst they are large and 

 pectinated in A. Latrellianus (female = A. Patrati), and with the 

 pulvillus small. 



Aulacus Guerinii, Westw. 

 Syn. Aulacus ater, Guerin, Mon. Icon. R. An. Texte, p. 408. 



Entirely black, shining. Head large, with the crown very ele- 

 vated behind. Neck slender, elongated, received in a deep impres- 

 sion of the head. Thorax elevated, with the anterior lobe strongly 

 striated, transversely emarginated in the middle, the remainder 

 of the surface rugose and striated. Abdomen smooth, a little 

 compressed, much thickened, and a little curved at the tip, termi- 

 nated by an ovipositor, nearly as long as the abdomen, with the 

 lateral filaments black. Legs moderately elongated, slender, 

 shining, posterior tarsi with the hinder half of the first joint and 

 all the second yellow. Wings transparent, with black veins, the 

 tip of the fore wings slightly stained with brown. Antennae long, 

 slender and black. 



Long. corp. 13, expans. alar. 21 mill. 



Habitat Rio Janeiro. 



