1879.] 249 



point out — as Mr. Doubleday did to me six years ago — its close re- 

 semblance to that of SpiJonota rolorana, and also to record what does 

 not seem hitherto to have been noticed, that in the curious ball of 

 leaves formed by the determined spinning of the larva, along with the 

 vigorous growth of the bramble shoot, there is a chamber of consider- 

 able size completely stuifed with the closely packed excrement of the 

 larva. 



Pembroke : \2t7i Ilarch, 1879. 



NOTES ON THE BEITISH SPECIES OF THE GENUS ODYNJERUS. 

 BT EDWAED SAUNDEES, F.L.S. 



I have lately been examining our British species of this genus, 

 with the assistance of Thomson's excellent "Hymenoptera Scandi- 

 navise," and I thought that the results I have come to might be useful 

 to other Bi'itish Hymenopterists. Our species of the genus may be 

 easily divided into the three known sections, thus : — 



I. Species without a raised transverse line at the base of the 



Ist segment of the body Hopioptra 



II. Species with a raised transverse line at the base of Ist 

 segment : — 



a. Apical joint of antennne in ^ recurved, basal joint 



of abdomen in both sexes with long hairs Ancisteoceetjs 



i. Apical joint of antennae in $ simple, basal joint of 



abdomen in both sexes naked . Symmoephus 



In the first section {Hojjlopus) are four species : spinipes, melano- 

 cephalus, lcBvip)es, reniformis. Of these, reniformis is distinct by the long 

 yellow spine on the intermediate coxaB of the ^ , and the yellow spot 

 on the clypeus of the ? ; Icsvipes differs from the remaining two in 

 having the intermediate femora of the ^ simple, and the thorax in both 

 sexes truncate in front, with the angles prominent; spinipes differs from 

 melanocephalus in being larger, with yellower markings, and the 

 pubescence on the head and thorax denser and darker, the ? s are 

 easily separated, as the clypeus in melanoceplialus is nearly entire in 

 front, whereas in spinipes it is deeply notched. 



In the second section (Ancisfrocerus) basalts has a red basal joint 

 to the body ; quadratus may be separated off at once by the second 

 segment of the body beneath being slightly raised towards the base, 

 and then falling abruptly to the level of the transverse crenate sul- 

 cature ; pariehim can next be distinguished by the second segment of 

 the body, beneath, beyond the basal sulcature, being quite flat longi- 



