1904.] 



171 



1. H. diiidcma Hal. : (H'curi'iiij^ on the; coast, and ofti'U in abundance, 



from j^ournciiiouUi lo Llanbe<li- and Abcrhidy ; Col. Yerbury 

 has taken it at Beer Ferris, near Plymouth. 



2. //. latipennis Fall. : in Walker's Ins. Brit. Dipt, this species is 



given as " Eare, on the sea-coasts (E. I.)." I do not in the 

 leavst doubt its authenticity as a Jiritish species, but I have 

 never met Avith it. The elon<,'ated basal joints of the an- 

 tenna; distinguish it from any European species of this or the 

 allied genera. 

 In dealing with the genus If!/(jroceleuthus a comparison should be 

 made with the new species DoUchopus laticola. 



5. DOLICnOPUS Latr. 

 Males. 



1 (22) Femora black ; anteniite always wholly black (femora diiskj, coiif. 27 



signifer, 28 clavipes, and 44 rujjestris). 



2 (17) Lower poslocular cilia black. 



3 (lU) Tibiae black (at tlie utmost knees pale), or dark piceous when immalure 



(conf. 8 l(ificola). 



4 (5) Wings blackisli on outer half; basal joint of hind larsi very bristly... 



1. atratus Meig. 



5 (4) Wings not blackit-h on outer half; basal joint of hind tarsi only moderately 



bristly. 



6 (9) Last joint of front tarsi dilated. 



7 (8) Hind femora with a whitish fringe beneath near base ; anterior knees and 



middle joints of front fai'si ferruginous 2. Falleni Lw. 



8 (7) Hind femora with a short black fringe beneath ; legs entirely black, ex- 



cept absolute knee joints 3. melanopus Meig. 



9 (6) Last joint of front tarsi normal ; tibife sometimes piceous... 



4. picipes Meig. 



10 (3) Anterior tibiie yellow or iiale ferruginous. 



11 (12) Middle femora with two nreapical spines 5. campestris T>ile\g. 



12 (11) Middle femora with only one preapical spine. 



13 (14) Last joint of middle tarsi dilated 6. plaiii/arsin Fall. 



14 (13) Last joint of middle tarsi noriual. 



15 (1()) Face ochreous ; hind femora with long blaeki.sh fringe.. .7. lepi'dus Slwg. 



16 (15) Face silvery-white; hind femora without any fringe (conf. 4 />ici/>e«)... 



8. latico/a n. sp. 



17 (2) Lower postoeular cilia ))ale. 



18 (19) Face ochreous ; legs almost wholly black 0. <j/c/^)e* Meig. 



19 (18) Face white ; anterior tibiie mainly ferruginous. 



20 (21) Hind tibia blackish (tarsi with only one bristle above)... 



10. pLropu.t Hal. 



21 (20) Hind tibia; blackish at tip only 11. viiripeniiis Meig. 



22 (1) Femora pale (occasionally dusky, conf. 27 signifer, and especially 28 



clavipex). 



P 2 



