— 145 — 



finely illustrated by twenty-six plates that might well serve as a model for 

 American monographers. Very few species appear to be common to 

 the United States and Europe. The genera however are much the same, 

 the greater number found in Europe being due to the more advanced 

 state of the study there. 



The Myriapoda may be conveniently grouped in three orders* as 

 follows: 



A. — Body composed of 6 — lo segments; antennae 5-jointed; bifid, bearing three long 

 jointed appendages; nine pairs of legs; species minute, 0.5 — 1.5 mm. long 



I. PAUROPODA. 

 Antennae simple; species of medium or large size B. 



B. —Body more or less cylindric or half-cylindric; head normally composed of three 

 segments; antennae 7— 8-jointed; mouth parts consisting of protomalse** (man- 

 dibles') and deutomala; (labium) ; two pairs of legs to each segment 



II. DIPLOPODA. 

 Body usually flattened; head normally composed of five segments; antenna? 

 12 — 70- jointed; mouth parts consisting of protomal^ (mandibles), deutomalse 

 (1st maxilL^) and two pairs ofmalipedes (auxiliary lips); one pair of legs to each 

 segment III. CHILOPODA. 



I. PAUROPODA. 



The Pauropoda contain two well marked families as follows: 



Segments ten, not sculptured above; head and legs not concealed by projecting scuta; 



color pale; motions agile Fam. Pauropodidae. 



Segments six, tuberculate or sculptured above; body depressed, three times as wide 



as high; head and legs concealed by projection of segments; color reddish; 



motions slow Fam. Eurypauropodidae. 



The first family, Pauropodidae Lubbock, contains a single genus 

 Pauropus Lubbock, with two American species. The second, Eurypau- 

 ropodidae Ryder, contains the genera Eurypauropus Ryder, with one 

 American species and Brachypauropus Latzel, as yet found only in 

 Europe. 



The entire number of Pauropoda described is seven as may be seen 

 from the following table. 



* Dr. Packard though originally accepting Lubbock's order Pauropoda is now 

 disposed to unite it to the Diplopoda as a suborder. It is perhaps better for the 

 present to retain this group in the form Lubbock first placed it. For Packard's later 

 views cf. Proc. Amer. Philos. Soc. XXI, 204. 



** For a discussion of these organs the reader is referred to Dr. Packard's paper: 

 "On the Morphology of the Myriapoda", before quoted. 



