(dr. a. C. 0UDEMANÌ5). NEW LIST OF DUTCH ACARI, II. 5Ì 



Nympha. Length 280 /*. Curious is the disproportionate bulk 

 of the capitulum with the mandibles, which remember the observer 

 of the warrior ants and termites. Moreover the nympha ; seen on 

 its dorsal side, resembles, even in the mandibles, the female 

 (Fig. 115 and 119), and on its ventral side the male (Fig. 117), 

 except the total absence of genital aperture. There is an anterior 

 dorsal shield covering the thorax , and a posterior one protecting 

 the abdomen. The former shows a distinct line running from 

 shoulder to shoulder, curved backward , as if this thoracal shield were 

 coalesced from two other ones. Epistoma and hypostoma like in the 

 adult. The sternal shield passes bejond the coxae of the 4th pair 

 of legs ; it is however broader than in the adult sexes. The ventri- 

 anal shield however is perfectly that of the adult. 



Male. Length 385 ;t. — Dorsal side perfectly that of the female 

 (Fig. 115). — Ventral side with sternal shield extending beyond 

 the ^th pair of coxae (Fig. 117). One long hair behind the anus; 

 two long hairs on the posterior margin of the abdomen, and two 

 others near this margin , but planted on the posterior dorsal shield. 

 The horns of the hypostoma are heavy crooked chitinous bars , bent 

 upwards , around the chelae of the mandibles. The chelae , seen 

 from the ventilai side (Fig. 118) show a thick thumb-like gib- 

 bosity or appendage on the movable finger. This finger is some- 

 what shorter than the immovable one. Both fingers lack prominent 

 teeth. The epistoma (Fig. 120) is better understood by a figure 

 than by a long description ; it remembers us of that of Macrocheles 

 longisp'mosiis \ the median spine is always well-visible, does not 

 seem to be a perfect flat, bul a somewhat thickened and light- 

 refracting blade, without any colour. Mentum normal. Peritrema 

 short , reaching forward till the level between the 2d and 3d coxae. 



Female. Length 490 /<. Dorsal side quite similar to that of the 

 nympha and the male, described above (Fig. 115). The sternal 

 shield (Fig. 116) is in so far abnormal, as it extends one coxa 

 more backward as usually is the case , for the genital transversal 

 split is situated behind the fourth pair of coxae, consequently in 

 the abdomen, exactly there where it is situated in spiders, indeed 



