24:8 TEIsTTH ANl^UAL REPORT 



small; macula nigra conspicuous but not large; anterior feet strongly \ 

 armed with curved spines. The intestine anteriorly is furnished with 

 cceca, is twice convoluted, broadened before entering the rectum and 

 opens a little distance beyond. the oval seta in the heel of the post-ab- 

 domen; post-abdomen rather slender, toothed behind with a double 

 series of about twelve prominences, becoming distally sharp, strong 

 teeth; terminal claws curved at the end only, pectinate and bearing 

 two unequal but large processes near the base; eggs much like those 

 of Macrothrix. 

 Occurs in Lake Minnetonka, Hennepin Co., Minnesota, rare. 



LYNCEID^. 



But few of this large family, furnishing the majority of the Clado- 

 cera fauna of anj" locality and at any time of year, have been carefully 

 studied here. The following are mentioned as of particular interest: 



SUB-FAMILY EURYCERCIN^. 



The single species Eurycerciis lamellatns which constitut-es this sub- 

 family has been mentioned and figured in a previous paper. It is quite 

 abundant and constant. 



Eurycercus is connected with the true Lynceids by the following 

 genus which has quite as manj^ affinities with Euryceixtis as any Lyn- 

 ceid. Schodler seems to be the only writer who has laid sufficient 

 stress upon this similarity, though it may not be best to unite the two 

 forms as he did. 



Genus Leydigia, Kurz. 



LEYDIGIA QUADRANGULARIS, Leydig. 



(Plate VIII, 7-8.) 



The Minnesota species is referred to L. quadrangularis under the be- 

 lief that there is no specific distinction between that species and L. 

 acanthoceroides, Fischer. 



Our form does not agree in every particular with the very minute 



