and on the Species by which they were constructed. 255 



Description. — Antennae black, longer than the head and thorax, 3rd joint furcate, piceous, the 

 rays slender, serrated and plumose, being densely ciliated on both sides : palpi long, 

 slender and fuscous : head and thorax black and shining, the former with two elevated 

 lines arising at the outer oceUi and forming an elongated triangle, which terminates in 

 a little tooth or horn between the antennae : abdomen deep yellow, margin of the 7th 

 and two apical segments black : wings clouded with pale brown, costa, stigma and ner- 

 vures piceous ; superior with a large marginal cell and a small elongated apical one ; 

 three submarginal cells, the 1st and 2nd receiving each a recurrent nervure, 1st cell not 

 very long, 2nd with the outer nervure sinuated, 3rd cell very broad ; two transparent 

 patches on the disc, leaving the base, a broad fimbria and an undefined band across the 

 middle, brown ; inferior with the centre transparent : legs lurid ochreous, four posterior 

 thighs pale ferruginous ; hinder tibiae without spines above the apex, and piceous as 

 well as the tarsi. Length 4 lines ; horns 2 ; expanse 9 lines. From Brazil. 



3. SCHIZOCERUS OCHROSTIGMA, Curt. 



Mas fusco-niger, alis obscure hyalinis costa stigmateque flavis, pedibus ochra- 

 ceis; tibiis tarsisque posticis fuscis. 



Description. — Antennae black, 2nd joint straw-colour, 3rd furcate and densely ciliated on 

 both sides : palpi long, slender and straw-coloured : head and thorax black ; collar, 

 except behind the head, ochreous as well as the hinder margin of the scutel : abdomen 

 brown, pale at the base, black at the apex : wings yellowish, posterior margins fuscous, 

 darkest on the costa, nervures brown, with one marginal cell terminated by a triangular 

 one ; three submarginal cells, 1st not very long, 2nd quadrate, each receiving a recurrent 

 nervure, 3rd short and broad ; costa and stigma ochreous and yellow : legs ochreous ; 

 tibiae simple; tarsi, excepting the base of the 1st pair, and hinder tibiae, excepting at 

 the base, brown. Length of antennae 2 lines; body 3^; expanse 8 lines. From 

 Brazil. 



I supposed this to be the Hylotoma fusca of Klug*; but he describes the 

 middle of the thighs as black, and his specimen being from Mexico, I am in- 

 clined to think them distinct. 



Mr. Ellis having also brought home a nest constructed by a wasp, which 

 does not appear to belong to any of the species hitherto recorded as forming 

 similar habitations, it will prove an interesting addition to our knowledge of 

 this remarkable family. I am led to conclude that the nest of this wasp has 



* Jahrb. der Insect, vol. i. p. 247. 



