430 Rev. F. D. Morice’s Illustrations of 
characters of the head (elongate eyes, etc.), to form his 
“Sectio I” of Dolerus, and they are now recognised by 
systematists as a separate genus, viz. Loderus, Konow. 
Again, figs. 5, Plate XXIII, to 3, Plate XXIV refer to 
species which, because of the largely or entirely testaceous 
colour of the abdomen in all the 9° and nearly all the 
3S 3, were formerly considered distinct generically from the 
black-bodied Dolerz, and called by Leach, Stephens, etc., 
Dosytheus. Now nearly every one of these insects has a saw 
exhibiting characters either of the surface, or the margin, 
or both, which—with two exceptions (Plate XXIII, figs. 4 
and 5)—not one of the Dolerus spp. with black abdomen 
possesses! Ido not suggest that these differences are so 
essential as to support the idea that Dosytheus should again 
be considered as a “good genus.”’ Still it is interesting to 
find that in this group of insects a difference in the colour 
of the abdomen is so frequently correlated with a difference 
in the characters of the saw. And it is curious to note that 
on the other hand a difference in the colour of other parts 
of the body (e.g. in the thorax of the 9° and in the legs 
of both sexes) seems to have no connection whatever with 
the characters of the saw. Sanguinicollis and ravus 
(Plate XXIV, 11 and 12), the former with, and the latter 
without, red on the 9 thorax, have saws so identical in 
construction, as to make it highly probable that Konow 
was right in considering ravus as a var. of sanguinicollis. 
Thoracicus, another species with red on the thorax (Plate 
XXV, 12), is evidently most nearly allied to a group of 
entirely black spp. (Plate XXV, 6-11). Yet another such 
species, haematodes, has a saw much like those of the 
blue-black forms anthracinus and mitens (Plate XXIV, 
6-8). 
Finally, of the more or less red-legged species, the best 
known—gonager—has a saw hardly distinguishable from 
that of the black-legged niger (Plate X XV, 6, 7); whereas 
‘ puncticollis—which Konow considered, but wrongly, I feel 
sure, as a var. of gonager—and another red-kneed insect 
liogaster (Plate XXV, 1, 2) have saws which seem to place 
them in the group of aeneus; and gessneri (Plate XXIV, 
5) also with red on the legs has a saw unlike any of the 
species with similar external characters and allying it, I 
should say, quite unmistakably with the ‘ Dosytheus ” 
dubius (Plate XXIII, 10). 
Even in cases, and of such there are many, where it 
