— 14«— 



Chordeumidae and Stuxherg has referred this also to Craspedosoma. In the 

 light of these criticisms it will appear that this family needs another re- 

 vision. Until this can be made it will be best to leave the genera as Dr. 

 Packard has arranged them. I therefore append Dr. Packard's table as 

 given in the Transactions Amer. Philos. Soc. XXI, p. 178, omitting of 

 course Lysiopetalum which forms a family of its own.* 



A. — Body not setose; antennce long; eighth pair of legs of r^ modified, six jointed; 



genital armature small Pseudotremia Cope, i sp. 



Body setose B. 



B. — Body short and thick; eyes triangular; antennas slender; setK one-fifth as long 



as body is thick; legs short Cryptotrichus Packard, i sp. 



Body short and fusiform; eighth pair of legs of (^ two-jointed; seloe half as long 



as body is thick Trichopetalum Harger. 3 sp. 



Body slender; eighth pair of legs of (^ two-jointed ending in a claw; setae very 



long; eyeless Scoterpes Cope, i sp. 



Like Scoterpes; setce a little shorter; sixth pair of legs of (^ greatly swollen 



Zygonopus Ryder, i sp. 

 FamUy 5. LYSIOPETALIDAE Wood. 

 This family as now restricted consists of the single genus Lysiopeta- 

 lum Brandt, with a single species L. ladarium Packard, the form origin- 

 ally described by Say as lulus ladarius. 



RtmUy 6. lULIDAE Leach. 

 The three American genera of lulidae may be characterized as 

 follows: 

 A. — Body long and slender; segments 59; scuta strongly carinate; antennce short 



and thick; eyes in a linear series Cambala Gray, i sp. 



Scuta not strongly carinate B. 



B. — Scutum of second segment produced at the sides so as to reach the head; antennae 



short and thick, the joints shorter than broad Spirobolus Brandt. 5 sp. 



Scutum of second segment not produced; antennce more slender; the joints 

 much longer than broad lulus Brandt. 19 sp. 



ill. CHILOPODA. 



The Myriapods of this order are comprised in four well marked 

 families all of which are represented in North America; they may be 

 separated as follows; 



* I also append Latzel's diagnosis of Craspedosoma. Corpus subteres et plus 

 minusve iuliforme. Secjmenta carinis evanescentibus aut nuUis, tuberculis vel granulis 

 senis setigeris maj07'ibus vel minoribus ornata et sulco medio, longitiidinali exarata. 

 Oculi plenimque distindi. Antenna} longce et temies, articulo tertio maximo. Pedum 

 pariafemince [pjlerumque) 50, maris 48; pedes longi. Mas: Pedum paria duo in or- 

 gana eopulaiiva commvtata. 



