1	Antepronotal lobes reduced, with elongate scutal projection	2
–	Antepronotal lobes narrowed dorsally and medially narrowly separated	4
2	Maxillary palp reduced	P.hirsutum (Goetghebuer)
–	Maxillary palp five-segmented	3
3	Antepronotal lobe distinctly narrowed dorsally	P.longiligulatum Yamamoto, Yamamoto & Tang
–	Antepronotal lobe reduced, with anteriorly elongate scutal projection	P.discaudatum Amakye
4	Wing with dark spots	5
–	Wing without spots	11
5	Palpomeres reduced, palpomeres 4 and 5 combined about as long as palpomere 3; Sudan	P.brevipalpe Sæther & Sundal
–	Palpomeres five-segmented, fifth palpomere about twice as long as third palpomere	6
6	Antepronotum setose	7
–	Antepronotum bare	8
7	Superior volsella with two outer setae; France, Italy	P.lotensis Moubayed-Breil
–	Superior volsella without outer setae; Ghana, Tanzania	P.volselligum Sæther & Sundal
8	Wing with obvious spots; setae along inner margin of gonostylus strongly split	P.ramiferum Kieffer
–	Wing with a large black spot on entire basal area; setae along inner margin of gonostylus not split	9
9	Anal point strong, mid-part contracted in a large inflated globe apically, with candle-like spine	P.huapingensis Liu & Lin
–	Anal point strong and tapering	10
10	Tergites II–VI brown with dark brown bands at middle	P.heberti Lin & Wang
–	Tergites II–VI pale brown without brown bands at middle	P.baishanzuensis Song & Qi sp. nov.
11	Antepronotum setose	12
–	Antepronotum bare	15
12	Anal point broad, tapering towards apex; Canada and USA	P.ontario (Wally)
–	Anal point narrow, parallel-sided	13
13	Apical process of superior volsella without strong outer seta in apical half	P.okigrandis Sasa
–	Apical process of superior volsella with strong outer seta in apical half	14
14	Fore tibial scale pointed; tergite IX with strongly sclerotized circle; China	P.cyclus Zhang & Wang
–	Fore tibial scale rounded; tergite IX without strongly sclerotized circle; China and Japan	P.yamasinense (Tokunaga)
15	Scutum with a weak tubercle	16
–	Scutum without a tubercle	17
16	Superior volsella with one long outer seta; R2+3 distinct; China	P.jii Zhang & Wang
–	Superior volsella without outer setae; R2+3 evanescent; China	P.exilicaudatum Sæther & Sundal
17	Anal point broad, not parallel-sided; legs ringed with white	18
–	Anal point narrow, parallel-sided; legs not ringed	19
18	Anal point broad with strong median swelling and apical additional point; Ghana	P.bulbocaudatum Sæther & Sundal
–	Anal point awl-shaped, without an additional apical point; Ghana	P.subulatum Sæther & Sundal
19	Legs with dark patterns	P.paracyclus Qi & Song
–	Legs without dark patterns	20
20	AR 0.54–0.91; tergite IX with two setae; superior volsella short and broad; China	P.paucisetum Zhang
–	AR 1.15; tergite IX with more than 40 setae; superior volsella curved and tapered; France	P. sætheri Moubayed-Breil