S. Mahunka szerk.: Folia Entomologica Hungarica 31/1. (Budapest, 1978)

Ventral side (Fig. 101): Gnathosoma (Fig. 100) small, infracapitulum scarcely longer than its width, ap. sa. ending freely, ap. 2 fusing with arc of sejugal apodemes. Epimeres 1, 3 and 4 with sucking discs of equal size. Adhering plate normally developed. Legs: Tibiotarsal solenidion group of leg I (Fig. 103) with members long, well developed, t longer then ^ 2» an{

* even ^ l longer than latter. O ^ on leg II (Fig. 102) more than twice as long as <f j. End-hairs of legs III and IV (Fig. 104-105) thick, robust, the one on leg IV only half as long as length of end-hair on leg III. Material examined: Holotypus: No. 3099: Costa Rica; deposited in the USNM. Remarks: The new species may readily be separated from other species by its tibiotarsal solenidia of leg I, by the shape of the apical parts of legs III and IV. Histiostoma scindita sp. n. Measurements. - Length: 158 ,u, breadth: 122 u. Habitus: Body broadest at front corners of hysterosoma, hence gradually narrowing backwards. Propodosoma approximately triangual in outline with a rounded apex. Propodosoma towards the middle with increasingly large foveolae forming a row; surface of hysterosoma punctate. Dorsal side (Fig. 106): Inner pair of hairs of propodosoma somewhat shorter than same of outer pair and standing only a little in front of latter. Hysterosomal hairs in the majority long, directed characteristically foward. Ventral side (Fig. 108): Infracapitulum of gnathosoma (Fig. 107) oblong, palpi well separated. Apodemus developed, ap. sa. not reaching arc of sejugal apodemes, ap. 2 fusing with latter, ap. sej. and ap. 3 clearly separated, but ap. sp. not separated from ap. sec. Epimeres 1, 3 and 4 with sucking discs of equal size. Adhering plate normally developed, all discs D and Ds readily distinguishable. Legs: Adhering hair of leg I (Fig. 109) very large, similarly large is juxtaposed phylliform hair. Tibiotarsal solenidion group of 4 members, short and thin. ^ 2 on tne other hand hardly shorter than <f u5 j of leg II (Fig. 110) the longest. Legs III and IV (Fig. 111112) with simple end-hairs. Material examined: Holotypus: No. 3810: Ecuador; deposited in the USNM. Remarks: The new species is well characterizable by the formation of the solenidion group of tibiotarsus and by the striking sculpture on the surface of propodosoma. This combination of features at once separates it from all other known congeners. Pelzneria afluctuosa sp. n. Measurements. - Length: 148-160/1, breadth: 116-131 /1. Habitus: Body almost an exact ellipsis in outline, rounded in the front and behind by same arc. Dorsal surface of body punctured. Dorsal side (Fig. 113): Propodosoma resembling a segment of a circle, without an apex in front; base of propodosoma almost entirely straight. Frontal margin of notogaster weakly sinuate. Dorsosejugal region very narrow, with no sculpture. Prodorsal hairs short, both originating from body margin at an equal distance. Notogastral hairs short and simple. Ventral side (Fig. 114): Gnathosoma (Fig. 117) oblong in outline, slightly more than twice as long as wide, its length same with that of tibia of leg I. Solenidia bent S-like, long. Apodemes developed, apodeme 3 well discernible beside sejugal apodemes. ap. sa. long, not reaching unequivocally arc of sejugal apodemes. ap. sec. clearly seen, ap. sp. also long and developed, ap. 2 fusing with sejugal apodemes. Epimeres 1, 3 and 4 bearing very large sucking discs. Adhering plate also large, discs D and Ds all perceptible. Legs: Solenidion u) 1 of leg 1 (Fig. 115) longer than V £ also well recognizable. Adhering hair phylliform. Solenidion OÓ ^ of leg II (Fig. 116) much shorter than f j. Endhair of leg III (Fig. 118) crescentiform. Solenidion ^ 1 extraordinarily long, only a little shorter than tarsus. End-hair of leg IV (Fig. 119) simple and rigid. Material examined: Holotypus: No. 2721: Panama. 2 paratypes: from the same locality. Holotype: USNM; 2 paratypes (213-PA-77): HNHM.