CLASS V. INSECTA. 263 



Inhabits Europe : is rare in Britain, but has been taken near Dartford 

 in Kent, and at Windsor. 



Genus 401. TRICIIIOSOMA. Leach, Zool.Mlsc. vol. iii. 

 Bodj/ hairy: abdomen with tlie first articulation (especially in the male) 



but slightly emarginated, the four posterior thighs dentated (in the 



male thick). 

 Sp. 1, Tri. sylvaticum. Black, and slightly shining: abdomen of a dull 



yellow or brownish, the base and apex black: lemora blueish bl.irK . 



tibiaj and tarsi yellowish : wings with the apex bruwnish. 

 Inhabits woods near London, but is rare. 



Genus 402. CLAVELLARTA. Lamarck, Leach. 

 -Borfj/ hairy or but slightly hairy : abdomen with the first artirnliiiiiin 



scarcely marginated: femora of the four posterior legs withuuc ilenl.L- 



tions (of the male tliickened). 

 Sp. 1. C/u. marginatu. Black; apex of the antenna", tibia?, and t-.u-i 



yellow : abdomen with the margins of the posterior segments whiu. 

 Tenthredo marginata. Linn., Panz. Cimtiex marginata of authors. 

 Inhabits woods in Europe : and has once occurred at Windsor. 



Genus 403. ZAR/EA. Leach. 

 Ei/es of the male joining at the posterior part. 



Sp. 1. Zar.fusci'ita. Black; tibite and tarsi yellow, the superior wings 

 with a brownish band (abdomen of the female with the base white). 

 Tenthredo fasciata. Linnt, Fanz. Cimbex fasciata (>f authors. 

 Inhabits woods: is rare in Britain, 



Genus 404. ABIA. Leach. 



Abdomen of the male with an C'ongated, silky spot on the posterior 

 part: e>/es of the male nearly jjining. 



Sp. 1. Abia nigricornis. Antennae black: wings from the middle to the 

 apex with light brown spots : feet light red; thighs black and shin- 

 ing. 



Tenthredo nitens (female). Linn. Cimbex sericea, var. Fubr. Abia 

 nigricornis. Leach. 



Inhabits woods. 



Sp. 2. Abia serirea. 



Tenthredo sericea. Liniic. 



Inhabits woods and furze on heaths. 



Genus 405. AMASIS. Leach. 

 Body without spots: abdomen with the first articulation undivided. 

 Sp. 1. Ayn. lata. Back of the abdomen pale yellow, the first segment 



wholly black: wings at the base blackish, 

 Tenthredo Ijeta. Fahr., Panz. Cimbex Ifeta of authors. Amasis Iseta. 



Leach. 

 Inliabits England and Germany. It has once occurred near Bristol, 



