':
:::: ii i:
:t i:
::
::ii*
: i: 1 i ;;l:r:i;:i"r.T*H:e$
Wing membrane entirely trichose. Posterior surface of fore femur beyond subbasal white hair tuft with longer stronger usually black hairs some at least l-.5 times as long as tibial diameter (FiS.75a). Tergite 2 atleast slightly wider than long;
'::i':: : ili i iTl1: 'li:::i:'i",ff#f;I,$TiJsxi 3g(2g). Tergites black with silvery spots, without trace of yellow markings (Fig. 167). First tarsomere of fore leg as wide as long and strongly narrowed on basal half; following four tarsomeres each progressively slightly narrower (Fig. 80o). Mid and hind tibiae black with bases and some apices narrowly yellow. Boreal andwestern Canada, Greenland ..... uaripes Curran Tergites 3 and 4 with large yellow spots or almost entirely yellow (Figs. 1-68- 170). First tarsomere of fore leg at least 1.5 times as long as wide and strongly narrowed only very near base; following four tarsomeres each progressively slightly narrower or second or third tarsomere much narrower than precedingtarsomere (Figs. 59o, 86o-88o). Mid and hind tibiae
'l::: :::i l:':: :::::111'Y: :: T:':'':: :l'::lt1"l'xt 40.
Face distinctly produced forward below (Fig. 10). Yellow spots of tergites 3 and 4 slightly wider than long (Fig. 168). Second tarsomere (P. jaerensis) or third tarsomere (P parmatus) of fore
leg much narrower than preceding tarsomere (Figs. 59a,87a).
Hind femur black with apex narrowly yellow; hind tarsus ........ 4I
entirelydarkbrowntoblackabove
Face vertical or slightly receding below (Fig. 10). Yellow spots of tergites 3 and 4 distinctly longer than wide, confluent medially in some species (Figs. 169, 170). Second to ffih tarsomeres of fore leg each slightly nar'rcower than preceding tarsomere (Figs. 86o, 8Bo). Hind femur entirely yellow or with at most black ring on apical half; hind leg with second and third tarsomeres partly or
entirelydulltobrightyellowabove 4L
........
42
Fore tibia with many posterior hairs longer than tibial width; fore leg with second tarsomere much wider than long and only slightly narrower than frrst tarsomere (Fig. 87o). Mid femur
anteriorly without concavity, anteroventrally with only long fine hairs; mid tibia with many long fine anteroventral hairs much longer than tibial diameter (Fig. 87fl. Hind tibia on apical half with several anterodorsal hairs about twice as long as tibial diameter. Boreal regions . . . . . parrnatzs Rondani
2t7