of the original material given by Dr. Eisen to the United States 

 National Museum shows that the internal organization is the same as 

 that described for H. constrictiis (R(jsa). It is abundant rmd widely 

 distributed in the United States, including Alaska. It is most com- 

 monly found under the bark of fallen timber and in leaf mold. 



llclodrilus lunyiciuctus Smith and Gittins [15:54^]. — Common 

 in the soil of lawns and parkings at Urbana, Illinois. Nothing is yet 

 known of its further distribution. 



llclodrUus ::.ctcki Smith and Gittins ['15 : 545]. — Common in and 

 under decaying logs in central Illinois and northern Michigan, and 

 projjably has a quite extensive range east of the Mississippi River. 



llclodrilus gicsclcri hcnipcli n. var. (PI. XLI, Fig. 1-3). — Most 

 commonly taken under the bark of fallen timber. Found in central 

 Illinois. 



Octolasiumlactcuui Orley (PI. XLI, Fig. 16 and 17). — [Michael- 

 sen, '00: 506.] Very abundant in the soil of many cultivated regions 

 of the Northern Hemisphere, and in other places where Europeans 

 have settled. 



Lumhriciis tcrrcstris L., Miiller. — [Michaelsen, '00: 511.] This 

 is the species most commonly described in text-books. It occurs 

 throughout Europe and the northern part of the United States. In 

 the Eastern United States it is abundant as far south as Washington, 

 D. C. Its distribution in Illinois is apparently local, and is due, chiefly 

 if not altogether, to its introduction by white settlers. Its large size, 

 strongly flattened posterior end, marked coloration, and the distinctive 

 position of the clitellum readily distinguish this species from other 

 Illinois earthworms. 



PJieretitna hetcrocliaeta (Michaelsen). — This species has been 

 collected in a greenhouse at Urbana. It is found in open fields in 

 several of the Gulf States, and is very widely distributed in the warmer 

 parts of the world. In common with other species of the genus it has 

 numerous setae per somite, and it differs from most of them in having 

 the ventral setoe much larger than the other seta^ and the spaces be- 

 tween them somewhat greater. 



Phcrctima JuvK'uyana (Rosa). — Under the name of Perichccta 

 berniudciisis, this species is reported by Harper ('05 : 18) as occurring 

 in a greenhouse at Evanston, Illinois. 



Helodrihis longus (Ude), H . chloroHcus (Savigny), H. parznis 

 (Eisen), and Liimbriciis ruhellus Hoffmeister have been collected in 

 adjacent states and their occurrence in Illinois seems probable. 



Tiliaria, Illinois, August. .I, 191;"). 



