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 (4-10) less strongly transverse than in that species; pronotum with die* 

 tinctly denser punctation, its punctures, especially at middle, very 

 close together, without or almost without intervals; the punctation of 

 elytra and abdomen also distinctly finer and denser than in pulla, and 

 dorsum thereby as a whole, especially however of head and pronotum^ much 

 less glistening. L. 2.5-3.5 mm. 



It is a permanent guest of the bank swallow, Hirundo riparia L., at 

 their occupied or resently vacated nests in sand banks it often is found 

 numerously, both in the nests, together with bird fleas, and at the en- 

 trance of the nest or right outside of it. 



The reason for, that this and other Mlcroglossa species seek bird's 



nests is evidently this, that they there find suitable nourishment for 



themselvee and their larvae. 7,'hether the nourishment consists of offal 



from the nest, dirt, blood and the like, or from the bird's and nest's 



other parasites. Is not yet determined.. It is rather remarkable that 



while pulla , mar.^clnalis , and pretty surely also gentiles preferably choose 



those in hollow trees established nests, nidicola holds exclusively to 



that of the bank swallow. 



4. Janus Crataroea Thorns. 



(Thorns. Ofv. Vet. Ac. Forh. IPEB, 34; Skand. Col. II, 282; Janglb. Kaf. 

 M. II, 54, - MicrO:;lossa . subg. Grataraea Muls. et Pey Brevip. 1874, .?C4). 



Very closely allied to Mlcroglossa Kr. , from which it by Thomson is 



separated, and to which it occasionally ie treated as subgenus (K'ulsant). 



In Grataraea the difference consists namely in, that the body is more e- 



qually broad, and the third joint in maxillary palpi is more slender than 



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