188 Linnean Society. [Feb. 6, 



Mr. Curtis then proceeds to describe two species of Schizocerus 

 from his own cabinet with the following characters : 



S. nasicor7iis, $ niger, abdomine pallid^ ochraceo apice nigro, alis nebu- 



losis, pedibus fuscis ; femoribus 4 posterioribus ochraceis, capite antic^ 



1-dentato. 

 S. ochrostigma, $ fusco-niger, alis obscure hyalinis : costS stigmateque 



flavis, pedibus ochraceis ; tibiis tarsisque posticis fuscis. 



The other nest brought home by Mr, Ellis is that of a wasp of the 

 Fabrician genus PoUstes, but differing apparently from any of the 

 species hitherto recorded as forming similar habitations. The insect 

 by which it is constructed is thus characterized : 



Myraptera brunnea, sericeo-fusca, pedibus ochraceis, femoribus genubus 

 tibiisque 4 posterioribus (nisi basi) fuscis, maculis duabus in genis 

 flavis. 



The nest is attached to a twig not much more than an eighth of 

 an inch in diameter. It is eight inches long and fifteen in circum- 

 ference, pear-shaped, and having on its outer margin a hemispherical 

 tubercle pierced with a circular hole a little more than half an inch 

 in diameter. The materials of which the nest is composed are very 

 substantial ; and the external undulations allow of the tracing of 

 four layers of comb. Many of the neuters fell out on shaking, but 

 neither males nor females were detected. The specimen being 

 unique, Mr, Curtis has not cut it open, but he entertains no doubt 

 that its structure is very similar to that of the nest of PoUstes nidulans, 

 figured by Reaumur. The following characters are those of a nearly 

 allied species, of which numerous neuters were contained in the 

 same collection : 



Myraptera elcgans, scriceouigra, capite thorace abdomineque lineis cin- 

 gulisque fulvis, tibiis tarsisque ochraceis. 



Mr. Curtis adds a list of the nine species referred to the genus 

 PoUstes, and which should be distributed into four genera, distin- 

 guished by the structure of the trophi ; no assistance being derivable 

 from the form of the antennse or the neuration of the wings. They 

 are as follows : 



I, Abdominis petiolo brevi sensim incrassato. 



1. PoUstes GalUca, L. 



2. ^ctcBon, Hal. The nest resembles the foregoing. 



3. Jfricana, Pal. de Beauv. 



II. Abdominis petiolo brevissimo, abrupte incrassato; thorace postice 



truncato. 



4. Ep'ipone nidulans, Fabr, 



5. Leeheyuana, Latr. 



