Genus Felisacus Distant' — WOODWARD 
47 
across eyes narrower in proportion to width 
immediately behind eyes, where head is rather 
more expanded and wider also in proportion 
to basal collum, the posterior lobe of prono- 
tum relatively somewhat shorter in mid-line 
and wider at base, and the cuneus propor- 
tionately rather shorter. From elegantulus 
(Reuter) it differs in colour, the smaller size, 
the eye wider in proportion to interocular 
space, basal collum of head narrower in pro- 
portion to width both behind eyes and across 
eyes, pronotum somewhat shorter in mid-line 
relative to head, with base proportionately 
wider. From nigricornis Poppius (not seen) it 
differs in colour and the relatively shorter 
pronotum and first antennal segment, and 
from jacohsoni Poppius (not seen) in colour, 
the smaller size, the relatively shorter heme- 
lytra and first antennal segment, the pronotum 
shorter, more declivous, and less narrowed 
from base to apex. 
Felisacus usingeri n. sp. 
Fig. 3 
structure: Head long and narrow, scarce- 
ly wider across eyes than long (14:13); as seen 
from above, not concave in front, anterior 
margin between antenniferous tubercles nearly 
straight, slightly convex, about 0.25 width 
across eyes (3.5:14); 0.4 as wide again across 
eyes as immediately behind eyes (10:14), 
thence gradually and slightly narrowed to 
base of head, where 0.9 as wide as behind 
eyes; no collum or annular subbasal constric- 
tion; crown with a transverse depression be- 
hind and between eyes, scarcely extending 
beyond level of their inner margins; seen from 
above, postocular part of head distinctly 
longer at sides than length of eye (7:5), with 
sides nearly straight, slightly sinuate behind 
middle. Eyes moderate, each over half as wide 
as interocular space (3.75:6.5). Seen from the 
side, eye equal in height to length of the 
vertical, apical (subocular) part of head from 
ventral margin of eye to base of rostrum (7:7). 
Antenniferous tubercles short, scarcely pro- 
jecting beyond apex of head. Rostrum reach- 
Fig. 3. Felisacus usingeri n. sp. Head and pronotum. 
ing middle coxae; relative lenghts of segments 
I-IV, 5:5:11:16. Antennae shorter than body 
(85:110); segment I shorter than pronotum 
(18:22.5), about 0.25 longer than width of 
head (18:14), moderately swollen at basal 
third and tapering to just before apex, widen- 
ing slightly at extreme apex; segment II 
slender, cylindrical; III and IV extremely 
slender, curved; I with sparse, erect, pale 
hairs, other segments pubescent; proportion- 
ate length, I-IV, 18:27:26:14. 
Pronotum about 0.75 as long again as head 
(22.5:13); collar short, about 0.09 total length 
of pronotum; posterior lobe half as long again 
as anterior lobe, including collar (13.5:9); the 
constriction between them deeply punctate, 
the two mesial punctures set distinctly for- 
ward; posterior lobe strongly convex, con- 
siderably raised above constriction, more 
shortly declivous toward base; base nearly 
straight, only very feebly emarginate before 
base of scutellum; over twice as wide across 
posterior shoulders as across collar (24.5:10.5) 
and rather wider than total length (24.5 : 22. 5) ; 
sides of posterior lobe in front of shoulders 
straight, evenly converging toward constric- 
tion. Scutellum rather strongly raised, with 
