Genus Felisacm Distant — WOODWARD 
49 
would be interesting to test the possibility of 
the eggs being inserted into and transported 
in fern stems (e.g., among packing material). 
SPECIES GROUPS OF FeLISACUS 
The species of Felisacus fall into at least two 
and possibly three groups. 
To the magnificus group belong magnificus 
Distant, 1904 (Tenasserim, Burma, and Am- 
boina, E. Indies), pulchellus Poppius, 1915^ 
(Philippine Is.), longiceps Poppius, 1915^ 
(Formosa), Hsiao, 1944 (Philip- 
pine Is.), crassicornis Usinger, 1946 (Guam), 
and usingeri n. sp. (Philippine Is.). This group 
is characterised by the subbasally swollen 
first antennal segment, by the nearly straight, 
scarcely emarginate base of the pronotum, 
and by the neck-like postocular part of the 
head gradually narrowing to the base, without 
a cylindrical basal collum sharply and com- 
pletely constricted from a wider region behind 
the eyes. In magnificus, philippinensis, and cras- 
sicornis, at least, the right clasper of the male 
has the form of a curved rod, slender through- 
out its length, not considerably widened and 
flattened basally; the left clasper is nearly 
straight and only feebly curved on its outer 
margin; the right clasper is slightly knobbed 
or spatulate at apex, and either the right or 
the left clasper, or both, may give off a shorter 
or longer internal branch; ventral margin of 
apex of abdomen narrowly convex between 
right and left claspers (Fig. 4). It is desirable 
that the other species should be examined to 
determine whether the male genitalia and any 
other structures can be used as group 
characters. 
In the elegantulus group are included elegan- 
tulus (Reuter, 1905) (Australia and New Zea- 
land), filicicola (Kirkaldy, 1908) (Fiji and 
Samoa), nigricornis Poppius, 1912^ (New Gui- 
nea), Poppius, 1914 (Java), ochraceus 
Usinger, 1946 (Guam), and amboinae n. sp. 
(Amboina, E. Indies). The features of this 
group are the cylindrical first antennal seg- 
ment, not swollen subbasally, the distinctly 
excavated base of the pronotum, and the 
clasper; L, left clasper). Felisacus magnificus Distant: 
a. Apex of abdomen (posteroventral) ; b, left clasper 
(posterior). Felisacus philippinensis Hsiao: c, Apex of 
abdomen (posterolateral); d, right clasper (ventro- 
lateral) . 
differentiation of the base of the head as a 
cylindrical collum sharply and completely 
constricted from a wider region just behind 
the eyes. In elegantulus, filicicola, ochraceus, and 
amboinae, at least, the right clasper of the male 
is considerably widened and flattened basally 
and narrowed and curved apically, the inner 
margin with a more or less pronounced sub- 
basal expansion; the left clasper is strongly 
curved upward and inward, with its outer 
margin strongly convex; ventral margin of 
apex of abdomen widely convex between 
right and left claspers. (See Figs. 2, 5.) 
It seems possible that some or all of the 
following species might form a third group: 
glabratus (Motschoulsky, 1863) (Ceylon, Java, 
Philippine Is.), auritulus Distant, 1913 (Sey- 
chelles), carpenter ae Hsiao, 1944 (Singapore 
and Borneo), and perhaps also madagascarien- 
sis Poppius, 1912^^ (Madagascar). From the 
descriptions, these would seem to present a 
different combination of characters from that 
shown by either of the other two groups, but 
none of these species has been examined in 
the present study. 
