14 
Records of the Australian Museum (2016) Vol. 68 
Hydropeza divaricata sp. nov. 
Figs 19, 23 
Type material. Holotype S, labelled: “AUST: N.QLD:/ 
Bellenden Ker N.P./ Bartle Frere Tr., 200m/ 12-2l.iv. 1994, 
malaise/ B. J. Sinclair/ 17°25'S 145°51'E”; “HOLOTYPE/ 
Hydropeza/ divaricata/ Sinclair [red label]” (AMS). Paratypes: 
Queensland: l&S, 9 ^ 5 ? same data as holotype (AMS); 5 
SS, 3? J, 4 km up Mt. Edith Rd, 800 m, Danbulla St. For., 
MT across ck, 22-27.iv. 1994,17°05'S 145°38'E, B. J. Sinclair 
(CNC); 3(?(^, 2$$, Mt. Hypipamee NP, 960 m, Barron R., 
27.iv.1994, 17°26'S 145°29’E, B. J. Sinclair (CNC). 
Diagnosis. This species is distinguished from other 
Queensland species by acrostichal setae extending posterior 
to (level of) second dorsocentral setae; male scutellum with 
at most a pair of elongate discal setae; male mid femur with 
short row of basal posteroventral setae and mid tibia with 
short row of spine-like setae on apical third; male hind 
trochanter without spine-like anteroventral setae; and male 
cercus deeply forked, U-shaped. Females are distinguished 
from all other species by 1-2 pairs of discal setae on the 
scutellum and acrostichal setae extending posterior to (level 
of) second dorsocentral setae. 
Description. Head and abdomen dark brown, thorax 
brown with paler patches; coxae brownish yellow, legs 
progressively darker towards tips. Wing length 3.3-4 mm. 
Male. Head. Ocellar setae very long, erect, divergent, inserted 
posterior to anterior ocellus; ocellar tubercle with some long 
setulae; postocellar seta stout and dark; upper postocular setae 
stout and dark, lower setae fine and slender; postgenal setae 
similar to lower postoculars. Face without setulae. Scape and 
pedicel slightly paler than postpedicel; scape short and slender, 
slightly longer than length of globular pedicel; postpedicel 
not greatly prolonged, 3* longer than scape, basal portion 
elongate-oval, longer than slender, straight apical portion; 
arista-like stylus slightly longer than postpedicel, concolorous 
with postpedicel. Proboscis stout and robust, extended slightly 
beyond mid-length of fore coxa, directed posteriorly; palpus 
less than half length of proboscis, clothed in long pale setae; 
apex of palpus rounded; apical third of palpus somewhat 
flattened with dense pubescence. 
Thorax. Clothed in fine pruinescence; mesonotum brown, 
with postpronotal lobe, lateral margin and postalar ridge 
pale brown; pleura paler than notum, pale along sutures. 
Setae generally long and stout; acrostichal setulae extending 
between 2nd and 4th dorsocentral seta, less than 0.5x length 
of dc; pprn with 1 seta and several short setulae; 1 long 
presut spal; 5 uniserial dc, about subequal in length, with 
2-3 intermixed nearly subequal setae; 3 npl; 1 long psut spal 
and 1-2 finer setae; 1 pal seta; 1 pair of sctl, with 2 pairs of 
finer outer marginal setae; disc of scutellum with 1 pair of 
long setae. Antepronotum with pair of pale setulae. 
Legs. Coxae and femora ventrally yellowish-brown; 
remaining segments increasingly darker apically. Inner 
anterior margin of fore coxa with some 15-20 dark, 
variously lengthened and thickened spine-like setae, mostly 
concentrated apically; basal most seta longer than width 
of coxa. Anterior surface of mid and hind coxae with long 
brown setae. Legs clothed in very long setae as typical for 
genus, especially ventral faces. Fore femur straight, inflated 
(narrower than hind femur), with row of 2 stout anterior 
setae at apical fifth; 5-6 posterodorsal setae, stouter towards 
apex. Fore tibia with 2 anteroventral setae on apical third; 
2 anterodorsal and 2 posterodorsal setae; 1 anterodorsal 
preapical seta. Fore tarsomere 1 with 1 basal anteroventral 
and 1 preapical anterovental seta, more than 2x width of 
segment; 1 long basal ventral and 1 shorter ventral seta on 
basal third. Mid femur with 2-3 anterodorsal setae, 1 anterior 
seta and 1 posterodorsal seta on apical third; basal half with 
row of 4-5 stout postero ventral setae; apex with 1 anterior 
and 1 posterior preapical seta. Mid tibia with width reduced 
on ventral apical third, with row of 8 short spine-like setae; 
apex with short spur-like ventral seta; 1 anterodorsal and 1 
posterodorsal seta near mid-length; 1 basal posterodorsal 
seta; apex with 1 dorsal and 1 posterior seta. Mid tarsomere 
1 with 1 long anteroventral basal seta. Hind femur inflated, 
slightly broader than fore femur, without erect dorsal setae; 
with anteroventral row of stout setae along entire length; 
apical fourth with 2 anterodorsal, 1 anterior and 1 posterior 
seta. Hind trochanter without spine-like anteroventral setae. 
Hind tibia with 2 anterodorsal and 4-5 posterodorsal setae; 1 
preapical anterodorsal and 1 apical anteroventral seta; apical 
fourth with dense posterior setae. Hind tarsomere 1 without 
erect setae. All tarsomeres longer than tibia; ventral apical 
margin of tarsomere 4 of fore and midlegs somewhat pale, 
flattened and expanded; tarsomere 4 of hindleg not laterally 
compressed ventrally; tarsomere 5 of each leg lacking 
dorsoapical extension. 
Wing. Infuscate with 1 long basal costal seta, longer than 
sctl; all veins lacking setulae; R 4 and R 5 distinctly divergent 
apically; bm-m complete, but weakened proximally; cell dm 
truncate, subequal in length to cell bm; CuA + CuP reduced 
to streak. Halter brown. 
Abdomen. Tergites and stemites clothed in setae; setae 
of posterior margin overlapping more than half length of 
following tergite. T8 broad, one-third length of T7; posterior 
marginal setae slender, less than twice length of tergite. 
Terminalia (Fig. 23). Cercus elongate and lying along 
dorsal edge of epandrium, deeply forked, U-shaped; apex of 
upper branch rounded, arched medially; lower branch longer 
than length of upper. Epandrium narrow, tapered apically. 
Surstylus weakly differentiated, apex rounded, not prolonged; 
ventral margin with row of stout setae. Hypandrium keel¬ 
like, not greatly prolonged; apical margin truncate without 
medial notch; gonocoxal apodeme short, rounded; postgonite 
digitiform, divergent with arched, rounded apex. Phallus 
broad, apically flattened and spoon-shaped; ejaculatory 
apodeme L-shaped, longer than gonocoxal apodeme. 
Female. Similar to male except as follows: scutellum with 
1-2 pairs of discal setae; mid femur lacking row of stout 
postero ventral basal setae; mid tibia not narrowed apically, 
lacking row of spine-like setae; hind femur not strongly 
inflated, lacking anteroventral row of stout setae. Terminalia 
(not dissected): cercus slightly longer than epiproct, broad 
with rounded apex. 
Distribution. This species is recorded from northern 
Queensland sites at 200 m and above 800 m (Fig. 19). 
Etymology. The specific name is from the Latin divaricatus 
(spread apart, separate, fork), in reference to U-shaped male 
cercus. 
Remarks. A single female specimen was collected at Cape 
Tribulation (Little Cooper Ck, 75 m, 16°10'S 145°27'E), but 
a male from this locality is required to confirm its identity. 
