6 ANDRENID.K. 



as tho genua Ptilot/loxsa, Imt il hus a snbquadratc second subinar- 

 gin.il eell ; (he anteiiiue are diH'erent in consl ruction ; and the tongue 

 is diflerently I'onned, beini;- bhiiit, in lYdixjlossa it is acute. 



J . Mydrosoma metallicum. 



Female. Length Q^ lines. — Head and thorax black ; abdomen of a 

 metallic-green lustre above, beneath pale rufo-testaceous. Head 

 shining above and sparingly punctured, the clypeus with strong 

 punctures, its anterior margin ciliated ; the labrum and mandibles 

 in the middle rufo-testaceous ; tho flagellum bright fidvous, but 

 slightly fuscous above ; at the sides of the face and above the antennae 

 there is a little ochraceous pubescence. The thorax above densely 

 clothed unth short pubescence of the same colour, that on the sides 

 and beneath is much paler ; the posterior femora with a dense 

 tloccus of long whitish pubescence beneath, that on the ti])ia and 

 tarsi is black, as it is also on the anterior and intermediate legs 

 above : the olaw-joint of all the tarsi ferruginous, with the tips of 

 the claws black ; wings hyaline, with the nervures rufo-testaceous, 

 the tegulae ferruginous. Abdomen of a changeable lustre, metallic 

 green, with a pale ferruginous transverse fascia in the middle of the 

 first segment ; similar fasciaj are observable on the other segments 

 when viewed laterally ; beneath, the segments are fringed with 

 white piibescence, and the second and following segments have at 

 their lateral margins a tuft of black pubescence. 



Male. Length (! lines. — The general colouring is that of the female ; ' 

 but the abdomen is more elongate and convex, narrowing from the 

 base to the apex, which is rounded ; at the extreme base it is fer- 

 ruginous, as is also the middle of the two apical segments beneath ; 

 from the apical segment two small pale lamellae project; the pos- ' 

 terior tibiae are curved inwardly, and considerably widened at their , 

 apex ; the anterior and intermediate tarsi, as well as the articiila-j 

 tions of the legs, are rufo-testaceous. 



Hah. Ega, on the Amazon (coll. by Mr. Bates). 



LIOPROCTUS, 8mith. 



1. Lioproctiis fimbriatus. 



Female. Length 5-6 lines. — Head and thorax black, abdomen fer- 

 ruginous. The face with white pubescence; the clypeus strongly ' 

 punctured ; the flagellum of the antennae fulvous beneath ; the 

 mandibles feiTuginous at their apex and bidentate. Thorax clothed 

 above with whitish pubescence, on the sides and beneath it is 

 longer ; the legs ferruginous and pubescent, that on the posterior 

 tibiae and tarsi long, dense, and silvery white ; wings hyaline, the 



il 



