112 hy:menoptera. 



the first and the only specimen I have seen ; it is readily 

 distinguished from all other species by the elongate peduncle 

 of the abdomen; it does not appear to have been previously 

 captured by any one, no author has certainly described it. 

 This small species of ant belongs to the genus Tetramorlum 

 of Mayr, distinguished by having 4-jointed maxillary palpi, 

 the labial palpi being .3-jointed. This ant I do not think 

 constructs a nest of its own, but, as is the case with two 

 or three others of these small species, lives in the com- 

 munities of other ants ; I have several times found Tetra- 

 morium lippula in the nest of For-mica fuliginosa, other 

 Entomologists have also found it in the nest of the same ant. 

 Last year I found this species in some abundance in and in 

 the vicinity of a nest of Fomnica rvfa ; the rare Stenani7n.a 

 JVestrvoodii inhabits the nest of the same ant, as well as 

 31yrmica muscorum ; the latter species is found in many 

 parts of the continent, but has not hitherto been observed in 

 this country, but I feel satisfied that it only wants well 

 hunting for in different localities in order to add it to our 

 fauna. 



The last capture that I have to notice is an important one 

 in some respects, as it appears to me to throw a light upon a 

 subject that has long perplexed Hymenopterists. Professor 

 Boheman once asked me if I knew the male of Eriocampa 

 ovata ; this Tenthreclo is very abundant in many situations 

 where alders are growing, the larva feeding on the leaves of 

 that tree, and in such situations I have frequently taken it ; 

 all the specimens however that I have either taken myself, or 

 seen in collections, have been females ; my answer to the Pro- 

 fessor's question was therefore in the negative. During the 

 month of August last I met with Eriocampa ovata in plenty, 

 near Lowestoft ; both larvae and perfect insects were numerous ; 



