1905.] 171 



24. SYNTORMON Lw. 



1 (4) Tip of middle tarsi dilated. 



2 (3) Coxae all yellow ; arista subdorsal ; basal joint of hind tarsi with two 



bristles beneath ; tips of middle tarsi and hind tibiiB conspicuously 

 dilated 1. tarsatus Fall. 



3 (2) CoxfE grey ; basal joint of hind tarsi with one curved thorn beneath ; tip 



of middle tarsi inconspicuously and of hind tibiae not at all dilated... 



2. monilis Walk. 



4 (1) Tip of middle tarsi not dilated. 



5 (6) Anterior femora with three bristles beneath near base ; squamse with dark 



fringes ; basal joint of hind tarsi unarmed beneath... 



3. pumilus Meig. 



6 (5) Anterior femora witliout any bristles beneath ; squamae pale haired. 



7 (8) Hind tibise not ciliated, nor dilated towards tip ; middle femora with two 



rows of about twelve minute bristles beneath ; basal joint of hind 

 tarsi with two small curved spines beneath near base... 



4. denticulatus Zett. 



8 (7) Hind tibiae conspicuously ciliated or dilated towards tip ; (if eiliation in- 



distinct) middle femora without rows of minute bristles beneath. 



9 (10) Femora almost all black ; basal joint of front tarsi with a short blunt 



prolongation at tip ; basal joint of hind tarsi armed with a bristly 

 process beneath close to base 5. Zelleri Lw. 



10 (9) Femora all yellow, unless about tip of hind pair ; basal joint of front 



tarsi simple. 



11 (12) Basal joint of hind tarsi with one curved bifid thorn beneath near base ; 



hind tibiae scarcely dilated ; abdomen often yellow about base... 



6. paUipes Fabr. 



12 (11) Basal joint of hind tarsi witli two long bristly hairs beneath ; hind tibiiB 



blackened, dilated, flattened, and channelled 7. sulcipes Meig. 



1. 8. tarsatus Fall. : a very distinet pretty species. Common in the 



Highlands of Scotland and also in the Lake District. 



2. 8. monilis Walk. : either uncommon or overlooked. I have taken 



it in Hampshire, Sussex, Norfolk, and Cumberland. 



3. 8. pumilus Meig. : occurring, though not commonly, from the 



New Forest to Sutherland. 



4. 8. denticulatus Zett. : more commonly known under the varietal 



name of 8. biseriatus Lw. I have taken the yellow legged 

 form (= biseriatus) in Devonshire, Hampshire, Sussex, and 

 Suffolk, while Col. Terbury has taken it at Porthcawl in 

 Glamorgan. Col. Terbury took some specimens with dark 

 brown legs (= denticulatus) in Ireland in company with 

 Clinocera bistif/ma Curt. Mr. F. Jeukinsou took a male at 



