of some New Aculeate Hymenoptera. 73 



anticis, alarum squamd, macula rotunda subtus alas, scutelli 

 utrinque puncto lineolaque marginali, flavis. Abdomen nigrum, 

 segmenti basalis fascia postica lata, ad latera antice valde 

 producta, flava ; reliquorum margine postfco flavo-fasciato, 

 fasciis subtus productis. Pedes flavi, basi nigri. Alas sub- 

 hyalinae. Mas. 

 Femina difFert statural majori, capite maximo, macula triangu- 

 lari frontali, altera utrinque minori juxta oculos, alioque 

 magno utrinque ad angulos posticos, flavis ; antennarum 

 articulo basali subgracili, arcuato, testaceo, antice sulphureo, 

 reliquis testaceis, prope apicem superne obscurioribus ; tho- 

 racis angulis anticis, alarum squama, maculd rotunda subtus 

 alas, scutelli fascia emarginata transversali lineolaque mar- 

 ginali postice, flavis ; abdominis segmento primo fere omnino 

 flavo, vittd basali nigrd disci usque medium retro producta, 

 reliquis nigris, fascid apicali utrinque dilatatd flavd, 2 dl 3 tu que 

 subtus margine postico flavo ; pedibus flavis, basi nigris ; 

 alarum disco iridescent!, marginis antici dimidio apicali ob- 

 scuriori, venis purpureis, areolis basalibus flavo-notatis. 



These remarkable insects — closely resembling Eumenes on the 

 one hand, and Odynerus on the other — although differing much 

 in general aspect are nevertheless associated by several important 

 characters ; the peculiar veining of the wings being consistently 

 maintained in connection with other evidences of structure and 

 economy ; both species exhibiting an extraordinary prolongation 

 of the proboscis,* which is turned back and laid between the coxae 

 in a groove prepared for its reception along the under side of the 

 thorax ; both nidificating in briars, for which purpose this con- 

 formation of the lingua is obviously most appropriate ; and the 

 veining of the wings, although coinciding together in both, yet 

 differing essentially from that of all other established genera of 

 Diplopterous Hymenoptera, the second submarginal cell receiving 

 only one recurrent nervure, and the third submarginal receiving 

 the other. 



The larvae of the first, when full grown, measures about two- 

 thirds of an inch in length, and one sixth of an inch in diameter, 

 being of firm fleshy consistency, its colour opaque-white, each 

 successive segment presenting an overlapping margin ; it is nearly 

 of equal thickness throughout, with a slight distension about the 

 thoracical region, somewhat flattened beneath, and having the 

 posterior margin of each segment below vaulted and hollow. 



* See Kirby, Mon. Ap. Angl. 1, p. 90. 



