148 (I)Jt. A. e. UUDEMANS.) NOTIOS UN ACAUI. 



What, however, to say of the hypopial nymph described here 

 below, which is in its most primitive stade' of becoming an 

 aeronaut ! It seems to me thai the name of Acotijledou liuradoxu 

 is well chosen. 



The animal I'osemhles the hypopial nymphs of the yenus Tijro- 

 (jlijphus, without any trace of suckers. Its length is 215 ^\ its 

 colour pale. 



Fig. 48, Dorsal side. This is not wholly visible, as the lateral 

 margins are sufllexed ventrally. Probably this is an 

 instrument to fix on a s m o o t h s u r f a c e fi r m 1 y. 



AU the hypopi with a body with sharp edges have this beha^ 

 viour. The dorsum is quite polished without any structure. Thei'e 

 are two pairs of almost inperceptible hairs on the céphalothorax , 

 four pairs on the abdomen and three pairs on the sufflexed margin 

 (fig. 49). The abdomen lies over the céphalothorax with a sharp 

 edged margin. The line of demarcation in slightly bowed forward. 



Fig. 49. Ventral face. The epimera 1 are coalesced to form 

 an Y. The epimera '2 bow inward and hindward. Between legs 

 2 and 3 there is a distinct demarcation between céphalothorax and 

 abdomen, convex hindward. The epimera 3 are bowed forward 

 and inward, and, united with epimera 4, limit a space of the 

 abdomen which resembles a joint of a leg, so that at first view 

 one is deceived , believing that the legs 3 are close together. 



Legs 3 aiid 4 are planted at the venter, much inward, and as 

 they are short, the claws scarcely pass the circumference of the 

 abdomen. Legs 1 and 2 are not longer than 3 and 4 , but as 

 they are planted nearly at the anterior edge of the céphalothorax 

 they are wholly visible from the dorsal-side. — All tlie legs are 

 similar in structure. Tarsus 1 bears three curved and distally 

 spatulate hairs, one tactile hair, as long as tarsus and tibia, two 

 minute hairs and a rather long, distally slightly davate olfactoric 

 hair. Tarsus 2 hat only one curved , distally spatulate hair ; 

 moreover it is like tarsus 1 Tarsus 3 is only provided with 

 one distally spatulate hair and one little tactile hair Tarsus 4 has 

 a small and a long tactile hair, longer than the 4 distal joints of 



