30 



The species are mostly of a middle size, of a greyish-black colour, 

 and marked on the thorax and abdomen iu a very similar manner to 

 those in the genus Exorista. 



1 (22) Legs black. 



2 (16) Palpi yellow or red. 



3 (14) Wings with an appendix. 



4 (11) Scutellum partly or wholly rufous. 



5 Middle abdominal segments without discal seteo. 



6 (9) Face generally luteous. 



7(8) (10) Frontal stripe narrower than the sides of the frontalia, and the facial 

 setae reaching nearly up to the fronto-orbital oues...l. lar varum, L. 



8(7) (10) Frontal stripe equal in width to the sides of the frontalia, and the facial 



setee at some distance from the fronto-orbital ones... 



2. noctiiariim, End. 

 9 (fi) Face generally white. 



10(7) (8) Frontal stripe wider than the sides of the frontalia, and the facial setaj 



reaching quite up to the fronto-orbital ones 3. latifro7is,'Rnii. 



11 (4) Scutellum black or grey. 



12 (13) Middle abdominal segments witli discal setsB 4. rasiica,'F\n. 



13 (12) Middle abdominal segments without discal setae 5. erucaruin, 'Rnd. 



14 (3) Wings without, or with a very slight, appendix. 



15 Thorax blue-black and glistening, with white reflections... 



6. angeliccB, Mgn. 

 in (2) Palpi black. 



17 (20) Abdominal segments marked with straight black and white transverse 



bands. 



18 (19) The white abdominal bands very narrow 7. brevipennis, Mgn. 



19 (18) The black and white bands nearly equal in width 8. morosa, 'Mgn. 



20 (17) Abdomen tessellated with brown and black patches, which form irregular 



transverse bands 9. agilis, Mgn. 



21 The first posterior cell ending close to the tip of the wing, and nearly, or 



quite, closed 10. hortensis, Mgn. 



22 (1) Legs with the tibiae rufous 11. tibialis, ¥1x1. 



T. LARVARUM, L. 



Sides of frontalia and face mostly luteous ; frontal stripe narrower than the sides 

 of the frontalia ; fronto-orbital bristles extending quite half way down the face ; 

 facial bristles* reaching up to within a short distance of the former ; peristome 

 armed on each side behind the vibrissse with a row of bristles extending backwards ; 

 palpi yellow ; antennae black, with the second joint sometimes rufous at the end, and 

 about two-thirds of the length of the third joint, which is often thickened ; thorax 

 and abdomen clothed with grey pubescence, which is mostly luteous, the former is 

 marked with four longitudinal black even stripes, and has four external dorso-central 

 bristles behind the transverse groove ; the latter has the first segment black, and 



* The.se are the or:il bristles of Rondani and Schincr (" Mandborsten "), they are on the edges 

 of the facialia. 



