Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 55. (Budapest 1963)

Smit, F. G. A. M.: The zoological results of Gy. Topál's collectings in South Argentina 4. Siphonaptera

the zoological results of gy. tota

l's collectings : siphonaptera 429 7—9 in the female. The main rows are preceded by a row of small setae. In male 4—9 very slender, hairlike, pseudosetae each side under mesonotal collar, in female 5—-6. Mesosternosome with 5—7 setae; metepisternum with 5—7 small thin setae, metasternum with one large seta and metepimeron with an anterior vertical row ol 2—3 setae and a posterior vertical row (situated below the small circular spiracular fossa) of 3—6 long setae. Legs: Mesocoxal sulcus complete. An interesting feature is the sexual dimorphism of the cheatotaxy of the first two hind tarsal segments: the female has quite a normal chaetotaxy (as adequately described in the original description), but the male has on the inner side of those two segments a number of extremely long and slender setae which are minutely but distinctly serrate along 3/4 or 4/5 of their lengths (the basal part is smooth) (Fig. 7). Serrated setae are not known to occur in any other species of flea, except for <5 I^istronius ulus (JORDAN & ROTHSCHILD) in which the two long subapical setae on the posterior margin of the second hind tarsal segment are also serrated although much more minutely. Figs. 7, 8. Listronius fortis (JORDAN <FE ROTHSCHILD;. 7. Inner side of first two hind tarsal segments of male from l-.l Bolsón; 8. Sternum VII, spermatheca and ductus bursae of female from El Bolson. Abdomen: The chaetotaxy of the pregenital segments of the male is very similar to that of the female, with the exception of tergum VI which has 9 or 10 setae in the main row per side in the male as against 6 or 7 in the female, and tergum VII with 9 setae in male, 4 or 5 in female. Both sexes with one strong marginal antesensilial seta. Sensilium with 19 trichobothria in both sexes.