Ovipositor and Receptacula seminis 55 



Purcellia illustrans, 25 in Siro duricorius, 8 iu Parasiro corsicus, in which species ovipositor 

 is accordingly much shorter and proportionally thicker than in Purcellia. The joints of the 

 trunk, apart from the terminal one, do not differ much in length, as may be seen on the 

 figures (PI. IV., tig. 1 »; PI. V., fig. 2 ^j). The hindnmst joint or the two hindmost ones 

 are without setae ; of the remaining joints the first {Parasiro) has, or about the first half 

 of them {Purcellia) have each, a circle of six setae, the remainder have a circle of eight 

 set£e each. The setae increase in length towards the anterior extremity. In those genera 

 which we have examined the blades of the forceps (/) are not alike in this respect. In 

 Purcellia (PL IV., fig. 1 v) there are three pairs of lateral setse, four pairs of dorsal ones 

 and four pairs of ventral ones, which are not all dispo.sed in the same way; in Siro (PI. V., 

 fig. 1 o) there are three pairs of each kind, lateral, dorsal, and ventral ; the arrangement 

 in Parasiro may be gathered from our figures (PL V., fig. 2 p and 2 q) which represent 

 ovipositor both from the dorsal and the ventral side. In them all the blades of the forceps 

 carry, besides those indicated, three long apical setEe of which the longest is directed straight 

 forwards and in Purcellia and Parasiro is inserted on the extreme end of the blade, which 

 is somewhat contracted; one of the two others is placed on the upper surface, the other 

 on tlie ventral surface ; they are directed forwards but at the same time point a little 

 outwards. In Purcellia and in Siro there is found on the exterior side near the end of 

 each blade a verj' peculiar heavy bristle or process {p in PL IV., fig. \ v; PI. V., fig. 1 o), 

 joined to the forceps by articulation ; it is directed a little outwards and divided into 

 seven branches, which are not connected with the main stem by articulation and are slightly 

 bent outwards. In regard to position these processes recall the wartlike prominences 

 carrying a pencil of setae, which occur near the extreme end of ovipositor in Phalangioidae, 

 and we believe that like the latter they are tactile organs. In Parasiro this branched 

 seta or process is not found, but in its place there are two slender undivided setse. 



In the preliminary notice of Loman's first paper {Zool. Anz. III. ISSO, pp. 90—92) he 

 announced that he found a pair of receptacula seminis near the end of ovipositor in 

 Phalangioidae, which discovery was confirmed by de Graaf, Rossler, and Soreusen (c). 

 According to de Graaf and Soren.sen they are equipped with accessory glands; according to 

 the latter with two glands to each receptaculum, and, in addition, he found them furnished 

 with a muscle. Sorensen (c) further found receptacula in a species of Laniatores which 

 he examined for the purpose. In a paper quite recently published Loman {g) states that 

 eight receptacula exist generally in Laniatores but two in Triaenonychoidse. That state- 

 ment, together with the fact that Phalangioidae are the only family amongst Palpatores 

 in which receptacula have been found, caused us to look for receptacula in representatives 

 of the three other families of Palpatores and in several Laniatores. In Phalangioidae we 

 did not find anything deviating from what has been hitherto known : the two rather 

 narrow receptacula, each with a more or less developed proximal lobe or branch (PL VI., 

 fig. 2), are placed at or close behind the base of forceps. In Troguloidae and Nemasto- 

 matoidae the receptacula are placed somewhat more posteriorly. In Trogulus rostratus Latr. 

 they are short rounded sacs. In Nemastoma lugubre O. F. Mtill. they are rather large, 

 laterally compressed and irregularly lobate (PL VI., fig. 6). In Ischiiropsalis they are 

 situated far backwards in ovipositor, almost at its posterior end ; they are very peculiarly 

 shaped, with four long branches (PL VI., fig. 4). Of Laniatores we have examined Pachyloides 

 uncinatus W. S. and Discocyrtus testudineus Holmb., both of the famil}' Gouyleptoidie, Assamia 



