Key to species of Ganguilus Navás

Ganguilus insignis (Navás) is not included in this key. No specimens of this species were examined and the description provided by Navás (1930a) is too imprecise to facilitate the selection of specific characters. A specimen tentatively referred to as Ganguilus sp.? is also included in the key.

1. Wings without markings ............................................................................................................................................... 2 Wings distinctly marked ............................................................................................................................................... 5

2. Wingspan greater than 60 mm. Middle femora without erect stout black setae on dorsal surface ............... pallescens Wingspan a maximum of 55 mm. Middle femora with erect stout black setae on dorsal surface ............................... 3

3. Hind wing rounded at apex ..................................................................................................................... Ganguilus sp.? Hind wing pointed at apex ............................................................................................................................................ 4

4. Body coloration mainly brown ............................................................................................................................ oblitus Body coloration mainly bright yellow .......................................................................................................... flavipennis

5. Mesonotum with tufts of erect long white setae .................................................................................................. veniae Mesonotum without tufts of erect long white setae...................................................................................................... 6

6. Mesoprenotum yellow with an anterior semi-circular black marking. Markings on wings clearly of two colours, black or light brown ...................................................................................................................................................... 7 Mesoprenotum black with two lateral yellow dots (Fig. 44). All the markings on wings of the same black coloration ...................................................................................................................................................................................... 8

7. In forewing three black markings and three crossveins between R and MP before origin of RS .................. imperator In forewing only two black markings and five crossveins between R and MP before origin of RS ......................... rex

8. Hind wings moderately falcate ....................................................................................................................... pulchellus Hind wings clearly falcate .................................................................................................................................. indicus