Xantholeon, Tillyard. Probably, 1916

Miller, Robert B. & Stange, Lionel A., 2012, The cave mouth antlions of Australia (Neuroptera: Myrmeleontidae), Insecta Mundi 2012 (250), pp. 1-65 : 30-31

Key to species of Xantholeon

Adults

l.

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Forewing vein 2A connected to lA by short cross vein, then strongly angled toward hind margin ( Figure 51); hind basitarsus shorter than one half length of distal tarsomere (except X. newi ) (lineatus group) ............................................................................................................................... 2

Forewing vein 2A curved toward hind margin, not connected to lA by cross vein ( Figure 58); hind basitarsus at least one half as long or longer than distal tarsomere (helmsi group) .............. 6

2(1).

— Forewing with dark mark at fusion of CuA2 and CuP + lA extending along 3 or more crossveins

( Figure 52) ....................................................................................................................................... 3 Forewing without extended cubital mark ( Figure 64) .................................................................... 4 3(2).

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Central abdominal tergites with small median dark brown mark clearly anterior to lateral marks; abdominal sternites pale; Western Australia ................................................. X. montanus New

Central abdominal tergites with median dark brown mark extending between lateral marks; abdominal sternites partially darkened; Queensland ...................................... X. lineatus New

4(2).

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Forewing with several conspicuous dark brown spots near apex ( Figure 64); forefemoral sense hair about three times as long as femur diameter at point of origin; Western Australia .......... ................................................................................................................................ X. xadnus New

Forewing without conspicuous dark brown spots ( Figure 42); forefemoral sense hair about four times as long as femur diameter at point of origin ...................................................................... 5

5(4).

Hind basitarsus less than one-half length of distal tarsomere ; abdominal tergite III without distinct dark bands, somewhat variable but usually with a dark stripe medially; wing relatively broad ( Figure 42); Northern Territory; Queensland .............................. X. cavernicolus n.sp.

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Hind basitarsus more than one-half length of distal tarsomere; abdominal tergite III with distinct dark brown band at anterior end and near base; wings relatively narrow ( Figure 56); Queensland .................................................................................................................................... X. newi n. sp. 6(1).

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Forefemoral sense hair less than twice as long as diameter of femur at point of origin ............... ................................................................................................................................ X. pallens n.sp. Forefemoral sense hair more than two times as long as diameter of femur ............................... 7

7(6).

— Hind basitarsus as long as or longer than distal tarsomere ......................................................... 8 Hind basitarsus shorter than distal tarsomere ............................................................................... 9 8(7).

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