53 



interior profoundly divided inlo nnmerous free conib-teelli, allogclher formed as 

 an anteriorly free serrnia" (PI. I, tigs. 1 c and 4 a, pi. IV, (ig. 4 a). According to my 

 investigations it wonld scarcely be quite correct to name the lamina interior "plate- 

 formed" in several species of Garijpiis L. K., as its terminal portion is dissolved 

 into dentaled lobes and its basal provided with well marked incisions and grooves. 

 Hansen's characteristic of this organ in the Hemictenodactifli suits rpiite admirably 

 to those forms, which he has examined e. g. Ideobishim crassimanum Halz. (49. 

 tab. V, fig. 6 b) and Romus Raiji L. Kock (fig. 12 b), but it will not agree with its 

 shape in f. inst. Ideoronciis Siamensis n. sp. or /. Uiminaliis n. sp. (PI. I, figs. 4 a and 

 5 a). This organ is in the latter f. inst. coalesced with the fingers in its whole 

 length, and basally provided with slight incisions and grooves, but distally dissolved 

 into leetli. But even if the definition quoted says too much, we must admit, that 

 there seems to be a real difference between this organ in the two suborders. It 

 can perhaps be expressed in tliis manner. The lamina interior consists in the 

 Panctciwdactijli of two as a rule well separated jiortions, a basal generally plate- 

 formed one, and a distal serruli-formed. The serrula (lamina) interior is in the 

 Hemictenodadyli a real serrula, and if not, there is no sharp distinction between 

 its basal and distal portions. 



5) The fifth character is for the Panctcnodactijli "The lower side of the maxillae 

 lying in the same plane as the coxae of the legs"; for the Hemictenodaclijli "The 

 lower side of the maxillae situated in a higher plane than the coxae, so that its 

 hindmost i)ortion, looked at from J)elow, goes under the coxae of the first pair of 

 legs '. Idcoronciix laminatits n. sp., in which the coxae and the maxillae are on the 

 same level, forms an exception to this rule, and so do several species of Garypns, 

 in which the coxae are not placed quite on a level with the maxillae. 



7) The seventh character is for the Panc/enorfac/y/j, "Céphalothorax considerably 

 narrowed anteriorly, without a median tooth on the anterior margin", and for 

 the Hemiclenodactijli, "Céphalothorax slightly or not at all narrower anteriorly than 

 posteriorly; the frontal margin with a median tooth" (PI. I, fig, 1 a and pi. II, figs. 1, 

 7,8 a). The character found in the shape of the céphalothorax is quite a good 

 one, taking into account the great variations especially within the Panctenodactyli. 

 The last character must necessarily be altered in a slight degree, for several species 

 of the Chthoniidae Hans, has no real tooth-shaped epistoma, but only a dentated 

 front margin (cf. below). 



8) A character of minor importance is found in the eleventh abdominal seg- 

 ment, which in the Panctenodactyli is "mostly plainly divided into tergite and 

 sternile or at least with an indication of such a division", while it in the 

 Hemictenodactyli is "forming a ring without any trace of division into tergite and 

 sternite". The two extremities are connected by intermediary forms viz. Olpinm 

 L. K. and Ideobishim Balz. (cf. Hansen 49. p. 221— 222). 



It is thus evident, that the two "suborders" are well distinguished from each 

 other by a number of more or less important characters, principally taken from 



