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

428 f. g. a. m. smit Listronius fortis (JORDAN et ROTHSCHILD, 1923) (Figs. 6—8; Pl. I) From the nest of Akodon olivaceus brachiotis: 2 $, 24. IV, 540 m.; from the nest of an undetermined rodent: 7 <? 3 $, 10. VI, 700 m. The females of the material listed above agree well with the holotype (the only known specimen, collected et Cholila, Chubut Territory, on January 26tl) 1920) of L. foriis and 1 am fairly confident that they are conspecific. The holotype of L. fortis has an ocular row of only two setae, the middle short seta being absent, but this is very likely an abnormality; the apical segment of the labial palp of the holotype is a little longer then the 2nd, 3rd and 4th segments together, while in the specimens from El Rolsón the apical segment is a little shorter — very likely the holotype is a little abnormal in this respect also. A redescription of the species is given below. x1 ig. fi. Listronius fortis (JORDAN & ROTHSCHILD). Segment IX of male from Iii Bolson. Head: Eye well-developed, sinuate, dark. Frontal row of six or seven setae, well away from frontal margin; middle seta of ocular row situated nearer to dorsal than to ventral seta and shorter than those two latter setae, especially in the female. Four to ten genal setae in male, four to six in female; as in the other members of the genus, these setae form a row on the middle of the gena. Occipital chaetotaxy rather variable: anterior and middle rows with 1—3 setae, but middle row in most instances consisting of only one large seta, posterior row of about half-a-dozen setae. The slender maxillary palps as lon<j as the five-segmented labial palps in the male, reaching almost to the apex of the fore trochanter; in the female the former reach to the apex of the fore coxa, the latter to the apex of the fore trochanter. Setae of antenna] pedicel very short; in both sexes antennal fossa open and extending well on to prosternosome. Thorax: Pronotum, mesonotum and metanotum with a main row of respectively 7, 7 or 8, and 7 or 8 setae on each side in the male, 7 or 8. 7—9 and