DOLERUS TRIGEMINUS. 161 



Allantus marginellus (Vol. I, p. 145). 



Yon Stein has pointed out (Ent. Nacht., 1885, 

 p. 115) that under the name of marginellus, Fab., two 

 good species have been confounded, namely, margi- 

 nellus, Fab., and omissus, Foerster (S. B. Z., 1844, 

 p. 289) = viennensis, Pz. (he described it as the Ten- 

 thredo viennensis, Schrank, which is probably an Em- 

 phytus), marginellus, Thorns. = viennensis, Andre. All 

 the examples I have in my collection are referable to 

 omissus, which is to be known from marginellus = 

 succinctus, Lep., by having the head and thorax 

 opaque and strongly punctured. 



Genus Dolerus (Yol. I, p. 157). 



The species with oblong eyes, almost emarginate 

 in the inner side, namely, palmatus, vestigialis, and 

 pratorum, have been formed by Konow (D. E. Z., 

 1890, 240) into a distinct genus, namely, Loderus, 

 Konow. 



DOLERUS PALMATDS (Vol. I, p. 161). 



Konow has separated the jpalmatus, Thorns., from 

 the palmatus, Kl., as a new species, under the name of — 



DOLERUS TRIGEMINUS. 

 D. E. Z., xxviii, 346. 



Our form belongs to it, and not to palmatus, Kl. } 

 which differs from it in having the head contracted 

 behind the eyes, the sheath of the saw before the apex 

 not emarginate, and having a small tooth there ; while 

 the S has only white on the first, fifth, and sixth abdo- 

 minal segments ; trigeminus having the head dilated 



vol. iv. 1 1 



