442 Mr. F. Smith on new Species 



Porrvpilus decedens. 



Female. Length 9| lines. Head, thorax, legs, and base of 

 the abdomen yellow, the rest of the latter black. The antenna3 

 reddish yellow, with the six apical joints fuscous ; the eyes 

 black at their outer margins ; the tips of the mandibles black. 

 Thorax of a reddish yellow above ; the metathorax, tegulge, 

 the scutellum at the sides, the postscutellum, and the posterior 

 margin of the metathorax paler, the latter being yellowish 

 white ; legs reddish, with a line on the posterior femora, within, 

 and the posterior tarsi black ; wings flavo-hyaline, palest at 

 their apical margins, the nervures ferruginous ; the costal 

 nervure fuscous. Abdomen : above black at the extreme base ; 

 the rest of the first segment reddish yellow, and with a pale 

 spot next to the black base ; the second segment at its base, 

 as well as the third, has a yellow fascia, the latter narrowest 

 and attenuated in the middle ; the second segment reddish 

 yellow, with two large black macular, which occupy nearly the 

 entire segment, except a central line and the apical and lateral 

 margins ; beneath, the three basal segments are pale yellow, 

 except the apical margin of the third, which is black. 



Hah. Para. 



Pompilus diversa. 



Female. Length 5-6 lines. Black, variegated with silvery 

 pile ; wings hyaline, with two transverse fuscous fascia. Head : 

 the face covered with silvery pile, in very fresh examples it has 

 a golden lustre ; the anterior margin of the clypeus, which is 

 transverse, more or less obscurely ferruginous ; the mandibles 

 ferruginous at their apex and the palpi of the same colour, but 

 paler ; the head is wider than the thorax ; the antenna? fulvous 

 towards their apex, sometimes obscurely so. Thorax : the 

 posterior margin of the prothorax angulated ; a silvery sjiot on 

 each side of the scutellum close to the lateral margins, and the 

 metathorax silvery at its apex, which is rounded ; an impressed 

 line extends from the base to the apex of the metathorax ; in 

 small specimens the legs are obscurely ferruginous beneath. 

 Abdomen : the basal margins of the segments more or less 

 ornamented with silvery pile, glittering brightly in certain 

 lights. 



Male. Length 5 lines. Of a much more slender form than 

 the female, and more brightly decorated w4th silvery pile ; the 

 face, cox£e, and abdomen at its base very bright ; the basal seg- 

 ment much attenuated; the legs elongate, slender, and spinose. 



Hah. Ega; Para. 



A series of specimens of this species, on being carefully 



