17(5 [August, 



frontal space bordered with bristles along its whole length ; antennae 

 of moderate length, with bare arista ; epistoxne flat, with two or three 

 oral setae on each side ; palpi with ends clavate, and armed with one 

 or two small aetx ; abdomen much as in Hi/dromyza. 



Sp. 1. — T. FBATEBNUS, Mgn. 

 Froiitalia black, bordered with white lines, and bright red in front ; antennae 

 black with a light red mark across the middle upon the base of the third joint ; 

 palpi white, clavate with a few apical setae; proboscis black; thorax black and 

 glabrous, partially covered with jellow-grey tomentum ; scutellum black with four 

 setse ; abdomen dark yellowish-grey, immaculate, sub-lanceolate in form with small 

 hypopygium ; wings grey ; legs with coxeb and greater part of femora nigrescent, and 

 tibiae and tarsi testaceous. Length 4—5 mm. Rare, but widely distributed. 



Gen. VIII.— CLEIGASTEA, Mcq. 



Clidogastra, Verr., Becker. 



Gen. ch. — Head sub-globose ; face rather short ; autennse variable 

 in length ; arista pubescent or bare ; oral setae mostly few ; palpi 

 filiform ; scutellum with two or four setae ; wings of moderate length ; 

 legs without peculiar armature. 



This genus, or rather group, contains a good many species which 

 dift'er considerably from each other, and have therefore been separated 

 by Becker, and placed in a number of new genera or sub-genera ; the 

 points of distinction between them are, however, mostly so trivial that 

 I shall (with two exceptions) leave the British species together ; noting 

 in the description of each those points of difference which led to their 

 separation. 



1 (6) Anteiinaj black. 



2 (3) Palpi black 1. nigrita, Fin. 



3 (2) Palpi pale. 



4 (5) Femora black or grey 2. oSscwra, Fin. 



5 (4) Femora rufous or yellow. 



6 (7) Oral setae two only ; antennae with third joint black 3. tarsea,¥\r\. 



7(6) (1) Oral setae several in number ; antennte quite pale 4. dorsata, Ztt. 



8 (5) Hind femora with black apices. 



9 (10) Body bright black 5. vittata, 'i^lgn. 



10 (9) Body grey 6. punctipes,'Mgx\. 



ISp. 1. — C. NIGRITA, Fin. 

 This slender shining black species has the frontal space narrow, yellow in front, 

 and black at the vertex ; face short, yellow, with white reflections ; palpi small and 

 black, without apical setae ; anteimae short, only reaching to middle of face, black, 

 with basal joints grey or rufous ; arista distinctly pubescent, and thickened at the 

 base ; proboscis black ; thorax with scutellum shining black, the latter with two 



