NOTES, ETC. 77 



Nomada armata on Andrena Hattorjiana. 

 ,, Gerinanicaon „ fidvescens. 

 „ sexfasciata on Eucera longicornis. 

 Coelioxys 4-dentata on 31egachile argentata. 

 „ Vectis on „ maritima. 



y, simplex on ,, Willughhiella. 



„ umhriiia on Sar7-opoda himaculata, 

 Stelis aterrwia on Osmia aurulenta. 



„ johoeoptera on „ fidciventris. 

 „ octomaculata on „ levcomelana. 

 The parasitic genus 31 elect a, of which we have two species, 

 are parasitic upon Anthophora retusa, and J., acervorum, 

 but they attack indifferently either species of bee. Some of 

 the species of Nomada do not, I believe, confine their 

 attacks to one species of Andrena ; 31. rujicornis appears to 

 be parasitic upon Andrena nitiday tibialis, and perhaps some 

 other species, but certainly the greater part of them are per- 

 fectly constant in their parasitism, the bee and its parasite 

 being always found together. 



The social humble bees are subject to the parasitic attacks 

 of allied species : Bombus lapidarius is attacked by Apathus 

 rapestris ; B. hortorum, by A. campestris ; B. pratoruMj 

 by A. Barhutellus; and B. terrestris, by A. vestalis ; the 

 latter also attacks B. lucorum. 



The parasitism of the fossorial Aciileata differs widely from 

 that of ApidcB ; their attacks are not confined to insects 

 belonging to their own order, or their own tribe ; some being 

 the parasites of Coleopterous insects. The genus Tiphia is 

 the only representative of the family Scoliadce, being closely 

 allied to the genus Scolia; a species of the latter genus, 

 Scolia Jlavifrons, having been discovered by Passerini to be 

 the parasite of Oryctes nasicornis ; of which a series of 

 illustrations are to be seen in the British Museum. Tiphia 



