- VRCINA. 25 



19(221 Eyes bare; face more or less projecting, 

 clothed on the aides with very short pale 

 hairs. 



20 (21) Median black stripe on the face broad and 



short, not extending beyond the median 

 tubercle; second and third yellow abdo- 

 minal bands constricted towards the 

 middle ; lateral borders of the abdomen 

 black; species of greater size (15 to 1(3 

 mm ), with less produced face and very 

 long proboscis eremophila, Loew. 



21 (20) Facial stripe narrower, but reaching the 



bas3 of the antennas ; second and third 

 yellow bands not constricted and lateral 

 borders yellow ; species of smaller size 

 (11 to 13 mm.) with more projecting face, rustrala, AVied. 

 22^19) Eves densely hairy; face exceedingly pro- 

 'jecting, clothed with long black hairs on 

 the sides : median facial stripe broad, not 

 reaching the base of the antennae : abdo- 

 men with the second and third yellow 

 bands constricted in the middle and the 

 lateral borders black hirsuticeps, sp. n. 



It is important to note that the forms belonging to the two 

 above-de lined groups seem to be in a very different condition. 

 The forms of the ericetonnti-group are less differentiated, so that 

 I am able to recognise practically a single species, divided into 

 many varieties, which inhabits mainly the centre and the north of 

 the Ethiopian Region, and besides extends throughout the Oriental 

 Region. The forms of the rostrata- group are more differentiated, 

 showing often very striking characters, such as hairy eyes, pro- 

 jecting face, <&c., so that I can distinguish five species, which are 

 more dominant in the south, with the notable exception of a species 

 (fiorii) which reaches the north of Italy ; species of this group are 

 wanting in the Oriental Region. 



15. Asarcina ericetorum, Fabricius (1781). 



This species is at once distinguished by the wholly yellow, less 

 projecting face, by the approximate antennae, and by the cariniform 

 facial tubercle. 



A very variable species, which I can at present subdivide into 

 the following six Ethiopian forms, of which gemmata. usambar- 

 ensis, and ft/pica are apparently very closely related, while the 

 others seem to be all very distinct. 



(a) typica, Sezzi (1908). 



Distinguished by its clear wings, mainly pale-haired scutellum, 

 the unconstricted first abdominal yellow band, and the linear black 

 bands. 



A couple of specimens from Obuas.i, Ashanti, 21. vi. 1907 and 

 9. vii. 1907 (Dr. Jr. J/. Graham). 



