DTTEHAM DIPTERA. 1 53 



XXIV. 238. 



10 (1). Last two or three joints of the mid tarsi dilated. 



11 (12). Third, fourth, and fifth joints of mid tarsi as well as 



the tip of second dilated ; hind metatarsus rather 

 broad, with two spines beyond the middle beneath, 

 one of which is the longer and bent. Coxae all 

 yellow. ( I 3°3- tarsatus, Fin.) 



12(11). Fourth and fifth joints of mid tarsi dilated; hind 

 metatarsus at the base beneath with a hooked 

 tooth, which is fringed with short curved bristles; 

 coxse grey. . ( I 3°5« monilis, Wlk.) 



240. XlPHANDRIUM, Lw. 



1 (12). Frons glossed with blue; at least the mid and hind 



coxae with black bristles. 



2 (3). Coxae all yellow ; abdomen with the second and third 



segments yellow. (1314- fascialam, Mg.) 



3 (2). Mid and hind coxae blackish grey; abdomen without 



yellow markings. 



4 (9). Hind femora with a praeapical bristle. 



5 (6). Outer lamellae ( $ ) ending in a long single hair ; fore 



coxae without any black bristles. 

 1 3 10. Xiphandrium monotrichum, Lw. 

 Bedburn, 1 $ and 1 ?, July. 



6 (5). Outer lamellae (<?) without any long terminal hair; 



fore coxae with three or four black bristles. 



7 (8). Outer lamellae {$) elongate lancet-shaped, with long 



pale pubescence ; antennae long. 



(13 13. auctum, Lw.) 



8 (7). Outer lamellae ($) broad lancet-shaped, with short 



black pubescence ; antennae comparatively short. 



(1313^-. lanceolahim, Lw.) 



9 (4). Hind femora without a praeapical bristle. 



10 (11). Inner lamellae ending in a long simple curved pale 

 hair. 

 1309. Xiphandrium caliginosum, Mg. 

 Bishop Auckland, 1 $ , May, 1900. 



