80 
amp:kican si’FX'ies of ahadus (hemiptera) 
or sliglitly arcuate to acute or very narrowly rounded apex, rather strongly 
and sharply elevated ; the discal elevation rounded, higher than sides, lleini- 
elytra (cf 9) extendiiig almost or fpiite to apex of abdomen, corium about 
to middle of fifth segment, exocorium very slightly expanded at base; meso- 
corium with one, cndo(“ornim without distinct transverse veins. 
d’ (fig. 171)). Fifth ventral segment very much shorter than sixth on 
median line, exhibiting characteristic structure; genital segment large, very 
strongly convex; abdomen ovate, broadest behind middle, lateral margins 
notched. Length, 4.(1 to 4.9 mm. 
9 (fig. 47a). Posterior margin of dorsal genital segment with small notch 
at middle, arcuately obli(iue on each side; abdomen elongate-oval, broadest 
at middle, the lateral margins almost entire. Length, 5.1 to 5.9 mm. 
I’his is a very striking species, widely distributed and repre- 
sented in most collections; it is readily recognized by the slender, 
biannulate antennae, pronotal form, and genitalic characters. In 
the male the ventral segments are modified in a manner peculiar 
to this species and graciUcornis, which renders identification of 
this sex certain at a glance. In many collections specimens of 
ah})as stand under the name hreviatus, and, indeed, the relations 
between these species are still problematical, as noted below. 
48. Aradus (Aradus) breviatus Bergroth (Plate V, fig. 48.) 
1887. Aradus hreviatus Bergroth, R('V. Eut., vi, p. 245. 
Disirihutiou . — East Florida (W. 11. Ashmead). 
Description . — Color and .structure as iu the ])receding, excei)t as follows: 
Postero-Iateral margins of lu'ouotum distinctly obli(iue (fig. 48d); hemielytra 
( 9 ) extemling well beyond apex of abdomen. 
cf. I'nknown. 
9 (fig. 48a). Dor.sal genital segment ap])arentl_y much abbreviated, the 
second genital segment vi.sible from above (through the wings); ventral gen- 
ital segments as in tlu^ precc'ding, oxcej)! that the genital lobes are truncate, 
scarcely extemling beyoml ai)ex of first genital segment. Length, 5 mm. 
'r^qie sitecimen (Florida) in Bergi’oth’s collection. 
ddirough the kindness of Hr. Bergroth I have been enabk'd to 
examin(‘ the tyi)e and only known siiecimen of this species. It 
pr('S('nts no charactt'ristics wholly foreign to (tbhas, excei)t in the 
structurt' of tlu' genital lobes and the dorsal genital segment. 
In siz(*, form of i)ronotum and of scutellum, and details of the 
gi'iiital s(‘gm(‘nts this individual ('xhibits c('rtain minor iK'culi- 
ari(i(‘s, but scarcely such as to b(‘ considcu'C'd lu'yond the range' of 
variation in ahlui.s. 1m) 1' ('xample', in a male' specimen of ahluts 
