16 The Craspedosomatidae of North America. 



pointed hair. (figs. 61 and 190.) Tliis structure is about the size 

 of the olfactory cones, but histologically it is different, the con- 

 tents of the enlarged base being evidently granular, instead of 

 longitudinally fibrillate as in the cones. 



Sazepin mentions nothing of this sort, and we have been unable 

 to find anything similar on the antennae of lulidae, Polydesmidse, 

 Lj'^siopetalidse or Pol^^zonidje. The structure in question is prob- 

 ably present in all Craspedosomatidae, and maj- be looked upon 

 as another evidence of the superior organization of this family. 

 We have had no opportunity of examining the antennte of Sco- 

 terpes, but find it in all the other genera here treated, 



4. On the same side of the same joint, just above the previouslj^ 

 mentioned organ is a considerable number of long slender cones, 

 differing from ordinary hairs in being thicker, and with a large 

 internal lumen. The base inserted in the chitin is large and 

 bulbous. 



5. On all sides of the distal portion of the sixth joint are scat- 

 tered transparent cones differing from the preceding sort in being 

 somewhat broader, with blunt rounded ends. They are also ver3^ 

 thin-Avalled, the lumen being continued nearly or quite to the end, 

 and are not enlarged at base. 



6. On the fifth joint, more numerous toward, but not confined 

 to the distal portion, are structures very similar to the last, but 

 differing in that they are longer, sharp-pointed, and of somewhat 

 denser tissue. They differ from those of the seventh joint in be- 

 ing larger and longer and not enlarged at base. 



t. On the distal portion of each joint are hairs two or three 

 times as long and large as the average. Similar hairs of other 

 families are by Sazepin denominated " Schutzhaare," explaining 

 their greater size by supposing them to be a special provision for 

 the protection of the sense organs, near which they are located. 

 They are probably articulated to the antennal svirface, being sur- 

 rounded by a chitinous ring at base. That their role is not con- 

 fined to what is mentioned above is shown by the fact that they 

 occur on joints where there are no shorter sense-oi'gans. A lu- 

 men can be seen extending through more than half the hair, the 

 distal portion of which is very slender and frequently fiexuous. 



The above structures are described from Gonotyla fischeri. 

 The same or equivalent seem to exist in other species, which do 

 not, however, offer equal facility of observation. 



