ENTOMOSTEACA. OF MINNESOTA. 19^ 



abdomen small. Anal teeth 12 to 14. Claws with a series of fine 

 setiB. Length 2.18 mm. In the male the lower margin of the head is 

 excavated and the flagellum of the antennnles short and straight. 



Dapliiiia Ion gi spin a Mueller. 



Mueller 1785; Straus-Durckheim '19-'20; Baird '50 (pulex var. longispina); Leydig '60; 

 Sars '61, and '64 (affinis); Mueller '68; Plateau '70; Lund '70-'7l ; Kurz '74; Hu- 

 dendorff'76; Hellich '77; Lutz '78 and '79; Herrick '84; Elymann '87; Walter 

 '88; Daday '88; Matile '90. 



A slender species of moderate size and transparent. Head not so 

 deep as the body, from which it is not separated by a depression^ 

 slightly concave behind the eye. Beak long and directed cando-ven- 

 trad. Eye large, near the margin. Shell oval; spine long, situated 

 above the middle line and curved upward. 



Two largest abdominal processes both directed cephalad and some- 

 what united. Anal spines 10 to 12. Claws with a series of fine setse 

 and two spines on the convex aspect. Length 2.0 to 2.5 mm. 



Flagellum of the male antennule hardly longer than the sensory 

 setae. The young have three teeth above as in D. minnehalm. There 

 is a great deal of diversity of opinion as to the value of this name. 

 Not that there is any doubt of the existence of a widely dstributed 

 form which in general is that intended by Leydig and others, but the 

 variation is so great that the possibility remains that more than one 

 species is included under the one title. 



P. E. Mueller recognizes two varieties depending chiefly upon the 

 length of the spine. 



*Daplinia minnesotensis sp. n. 



Plate L, Figs. 10-12. 

 Herrick '84 (rosea.) 



The later descriptions of D. rosea leave no doubt that this is a 

 distinct species. The abdominal processes are somewhat united at 

 the base instead of "manifeste discretis," and the first is much longer. 

 In many respects the species is near D. longispina. The original de- 

 scription is given: "In form very like D. longispina, this species, 

 which is the only representative of this smooth-clawed, unkeeled 

 group yet found in America, might perhaps be appropriately united 

 with that species. 



"Body oval, moderately ventri cose; head of moderate size, lower 

 margin nearly straight; eye situated in the anterior prominence. The 

 beak is not very prominent. The upper outline of the head is slightly 

 concave above the eye or rather less convex. The head is separated 



