THE MYRIAPODA OF NORTH AMERICA. 183 



1. Parajulus venustus Wood. 



Julus venustus Wood. Pi-oc. Phila. Acad. Nat. Sci., 10, 1864 (Illinois). 

 Julus venustus Preudhomme de Borre. Ann. Soc. Ent. Belg., 62, 1884. 

 Julus impressus Wood, etc. 



In this paper I have regarded the Julus venustus of Wood as repre- 

 senting a valid species and not identical with impressus, as Wood him- 

 self and other writers have later held. 



In the Trans. Anier. Phil. Soc, 190, 18G5, Wood makes venustus 

 and impressus the same, and mentions a specimen from Georgia. I 

 regard the specimens from Georgia as the true impresus, which is found 

 in Indiana, Georgia, and Florida, wdiile venustus is found in Colorado, 

 Kansas, Minnesota, Michigan, Illinois, and Indiana. 



2. Parajulus diversifrons (Wood). 

 Common. 



3. Parajulus ellipticus Bollman. 



This is a very common species, if not even abundant. 



4. Lysiopetalum lactarium (Say). 



Several specimens were sent in the last collection. 



5. Campodes flavicornis Koch. 



Not uncommon. Most of specimens sent were very young. 



6. Craspedosonia atrolineatum Bollman. 



A single female from here seems to agree in all the principal char- 

 acters with the types of G. atrolineatum, which are from British 



Columbia. 



7. Leptodesmus borealis, sp. nov. 



Anterior parts of segments reticulated with black, posterior border, 

 lateral carina?, legs and antennae yellow, an indistinct, broad, black 

 median, dorsal line. Body robust, narrow, strongly subterete. Vertex 

 smooth, sulcus extending to base of antenna 3 , setigerous foveola?. An- 

 tennoe short and filiform. First segment semicircular, sides slightly 

 margined, posterior border somewhat emarginate. Other segments 

 more or less corrugate, especially above lateral carina*. Lateral carina? 

 small, thick, anterior border not prominent, rounded, posterior scarcely 

 angulated, but produced posteriorly into thick, short, rounded lobes. 

 Mucro of last segment large and thick. Bepugnatorial pores moder- 

 ately large, lateral and subapical. Legs moderately long, extending 

 beyond sides of bodj^. Length of body? , 23.5 mn '; width and height, 

 3"""; length of antennae, 2.4 mm . 



Leptodesmus borealis differs from all the species found in Eastern 

 United States by its thick lateral carina? and the strongly terete body. 

 It approaches more to L. eruea (Wood) from Oregon. 



The above description is based on a female, which was collected near 

 Winona by Prof. Holzinger in the fall of 1887. 



