A. C. OÜDEMANS, NOTES ON ACART. 35 



nor its nerve. Upper-jaw with one enormous incisor, a small 

 canine tooth behind the sense-organ, and a knob-shaped molar. 

 Lower jaw with a robust end-incisor and a scarcely discernible 

 canine tooth. Moreover the lower jaw is obliquely pierced bv 

 a canal, as is shown in my two figg. 24 and 25. I could not 

 see through this canal, but Berlese distinctly draws an open 

 hole (Ac. Myr. Scorp. Ital. ; fase. 4; No. 3; fig. Id). 

 One is inclined to consider this canal as the result of the 

 thorough fusion of a lower jaw with a copulation organ, 

 but if we compare this lower jaw e. g. with that of a deuto- 

 nympha or of a female, we cannot help to believe not much 

 our hypothesis, for it appears to us to be tbe same jaw. 

 P u 1 V i 1 1 u m : a row of hairs. 



Maxillae. H y p o s t o m e (fig. 21) enormously diflferring 

 from that of the nymphae and females. Ventrally the pseudo- 

 capitulum has proximally and on the sides markings, especially 

 caused by less chitinized depressions. Jn the median line the 

 usual transverse rows of extremely minute triangular dentitions 

 are scarcely discernible. The horns are distally bifid and are 

 planted on solid chitinous stems, on which hairs I, II and III 

 are planted. Hair I moreover is so fine and placed so strange, 

 e. g. on an inward protuberance, that it was long before I 

 could detect it. Behind these stems there is a stronger chitin- 

 ization of the skin, not unlike a V. Between the horns and 

 the inner nialae there is a deep cleft, so that the inner malae 

 themselves seem to be very long or even to be placed ou a 

 similar stem, which in fact is not the case. They are prolonged 

 in the usual transparent slips and fringe. Palps. Dorsally 

 the trochanter (fig. 18) has a distal and outward thorn; the 

 femur has a central hair which is as usual curved inward and 

 forward ; and distally and inward it is as usual provided with 

 the transparent pin which is curved inward and forward. 

 Ventrally the trochanter (fig. 26) is provided : proximally 

 and inward with an almost square chitinous process; 



