116 (dr. a. c. oudemans) 



Measured on 25 specimens , all found on Xylocopa circumvolans 

 Smith, of Japan. 



The species (fig. 18) YQ^e.mhXe^ Trlchofarsus xifIocopae\)citi'^kT>\VL\5. 

 The 1st, 2d and 3d legs have 2 claws, of which one is enormous, 

 much stronger than that of Trlch. xyl. , and one small , forming 

 together pincers. The 4th leg ends into two hairs , of wdiich one 

 is very long, 0,543 millimeter (in a specimen of 0,325 mm. length) 

 and one smaller, 0,108 mm , consequently one fifth of the longer 

 one. The hairs of the dorsal surface are much stronger, stiffer and 

 blunter than those of Trick, xyl. The dorsal shield is sufflexed to 

 the ventral surface with one median fluted border (fig. 19); this 

 border lies under the oval suckerplate (between this plate and the 

 body). The chitinous hind-margin projects as a strong chitinous 

 bar forward , which lies on the inner surface of the dorsal shield , 

 and is much longer than that in Trick, xylocopae. 



The dorsal surface is exactly wrinkled in the same manner as 

 in Trick, xylocopae. Purposely I have therefore omitted these 

 markings in my figure of Xyl. alfkeni. 



Further the dorsal surface shows several symmetrically and 

 segmentally placed spots, without any indication of minute hairs; 

 perhaps they are pores. 



The ventral surface (fig. 19) shows the chitinous frames, nearly 

 exactly a copy of those of Trick, xyl. , but stronger ; moreover the 

 pieces marked with a a and b b are absent in Trick, xyl. (at least 

 in my two specimens, bought from Mr. Bourgogne in Paris). The 

 arrangement of the anal suckers is different too. In Trick, xyl. the 

 four greater suckers form nearly a straight transversal row. Here, 

 in Trick, alfkeni they are placed so, that the two outer form with 

 the hindmost ones a nearly straight row with a slight concavity 

 forward. Before the two largest suckers we observe two minute 

 ones. The hairs of the ventral surface , arranged somewhat different 

 from those of Trick, xyl. are flat, lanceolated, with a filiform distal 

 end, except two on the animal's flank, of which one is long and 

 stiff, like those of the dorsum, and one short poniard-shaped. 



Fig. 20 shows us 6 different aspects of the two claws. 



