- 
498 Mr, F. W. Edwards on 
As I have previously stated (1913), splendens and coeru- 
leovittata appear to be synonyms of genurostris, almost the 
only difference observable between specimens from Java and 
Kuala Lumpur (as also from Ceylon) being in the colour of 
the thoracic integument, which may perhaps depend on 
the age of the individual. However, the Philippine species 
(7. coeruleovittata) may be distinct from H. genurostris, 
since Dr. Ludlow describes the clypeus as being “ heavily 
covered with a rather long fine white fuzzy tomentum.” 
This could hardly be said of any of the five species I have 
examined, in which the clypeus is at most pollinose, distinct 
“tomentum’’ not being visible under a magnification 
of 100. 
The two described African species, however, are certainly 
distinct from one another, and from H. genurostris, though 
the distinction I have given between them (1912) does not 
hold good, being based on a mixed series. Besides these 
two, a close study of Mr. Farquharson’s material, in com- 
parison with that already existing in the British Museum, 
has revealed the existence of two more. It is certainly 
remarkable that there should be apparently only a single 
species in the geographically discontinuous areas of Ceylon, 
the Malay Peninsula, Java and the Philippines, while 
there are four distinct species in Africa; but this is the 
only conclusion possible from an examination of the 
available material. 
The five species are all very similar; the following diag- 
noses include all the characters (so far as I could ascertain) 
which are not common to all of them. 
KEY TO THE SPECIES. 
Clypeus yellow. 
Eyes separated by a scaled line . . 1. genurostris Leic. 
Eyes practically touching . . . . 2. taeniarostris Theo. 
Clypeus black. 
Head scales all blackish. . . . . 3. fraseri, sp. Nn. 
Head scales silvery in front. 
Mesonotum with median silvery line. 4. trichorostris Theo. 
Mesonotum without such line . . 5. farquharsoni, sp. n. 
1. H. genurostris Leicester. See Plate XVI, fig. 5 x 50. 
Jlypeus yellow, with a silvery-grey pollinosity. Proboscis 
(except labella) more or less yellow. Eyes narrowly separated by 
a silver-scaled line. Head with a patch of bluish-silvery scales in 
