EUMEJRUS. 240 



is dealt with in Leafle^ no. 2S0 issued by the Ministry of Agri- 

 culture, London, revised August 1921. 



li'Diip'. Europe, Asia, Orient, N. Africa, Cape, Hawaii, Xorth 

 Ainerii-a. The genus seems somewhat addicted to islands, ap- 

 pearing in the Canaries, St. Helena, lihodes, Sokotra, and llie 

 JSicobars. 



The genus seems to be allied to Merodon in the EHisTALirf.E 

 and certainly to Xijlota iu the Milesiin.e, Its species possess a 

 remarkable general resemblance to one another, and some care 

 is required to separate them wirh certaiur.y. All those admitted 

 herein are, I feel convinced, quite valid, as I have had the 

 advanta<Te of havni"; specimens of them all before ine. The 



till? 



principal cliaracters of differentiation appear to be the degree ot 

 contiguity or approximation of the eyes iu the c? ; their pubes- 

 cence ia both sexes; the fine white stripes on the thorax; the 

 coloration of the hiud margin of the scutellum, and the dilatation 

 or iiierassation of the hind tarsi iu the S . De Meijere (Tijd. v. 

 Eut. li, p. 21-1, 1908) notes and tabulates some Oriental species, 

 and various notes have been given by me (Rec. lad. Mus. xi, 

 p. 239, 1915). 



7'ahh of Species. 



1. Win<^-ti]) distinctly infuscated. Hind tarsi, 



including metatarsi, presumably not di- 

 lated, elonsate, wholly snow-white except [p. 251. 



at extreme base of 1st joint nicoharcnsis, Sch., 



Winj;-tip entirely clear 2. 



2. Antenna; orange or yellow 8. 



Antenna) black or nearly so 4. 



3. Eyes wholly with dense bright )-ellow pu- 



bescence. Length 5-6rj mm rt?<r(//-o?is, \Vied.,p.2o2. 



Eyes with very sparse whitish pubescence 

 on lower part only. Length 8 mm n('paleniis,Jivnn.,Y>--5S. 



4. Scntellnni with liind margin pale, coloured 



difierently from remainder and from 



thorax 5. 



Scutellum concolorous with thorax' 8. 



5. Scutellum with conspicuous dense orange- 



yellow iiuliescence 0. 



Scutellum with grey pubescence (brownish- 

 yellow in albifrons), concolorous with 

 that of thorax 7. 



6. Eyes bare : contiguous in cf for some dis- 



tance. No aeneous lavgo spots nt base of 



abdomen ; all three ])airs of spots very [p. 254. 



narrow and subequal. Length 12 nun... riifo'^ciitellatus, linin., 

 Eyes densely pubescent. A pair of very 

 large a;neous ,«pots on anterior corners of 

 2nd abdominal .segment, witli a ]»air of 

 narrow greyish spots su])eiinipose(l there- 

 on ; the pairs of .«<pots oi: .3rd and 4th seg- 

 ments narrow and grey as usual Length , p. 255. 

 7 mm ptc!c/ierri»ii(s, lirun., 



