38 THE CANADIAN ENTOMOLOGIST. 



A moderately long legged species in which the spines are arranged as 

 follows : Anterior femora with two spines beneath internally ; the middle, 

 with about four pairs and an outer apical one ; posterior femora with both 

 the inner and outer carinas of the lower edge very thickly set with minute 

 teeth-like spines, the inner row doubled near the middle. Posterior tibiae 

 furnished with five spines on each edge, somewhat alternately arranged 

 and with the intermediate spaces filled with teeth-like shorter ones ; the 

 lower edge is also supplied with three sub-apical and two apical spines 

 only a little less prominent than those above. Middle and anterior tibiae 

 with three pairs of spines each on the under side. Antennae moderately 

 long. Eyes of medium size, pyriform. 



General color very pale straw color. The middle and hind thoracic 

 segments, together with the first abdominal, marked above with a narrow 

 transverse black patch each. Through these there is drawn a narrow 

 dorsal line that severs them into lateral halves. Eyes shining black. 

 Spines of legs tipped with brown. In addition to the usual spines this 

 insect is characterized by the presence of numerous smaller, almost micro- 

 scopical spines that are scattered over the general surface of the femora 

 and tibit^. These latter are entirely brown. 



Length of body, $,19 mm.; of antennae, 30 mm.; of hind femora, 

 12.5 mm.; of hind tibise, 14 mm.; of ovipositor, 12.25 t^^^- 

 Described from one female and one immature male. 



Habitat. — Dawes and Sioux counties in northwestern Nebraska. The 

 female specimen was taken in a shallow well 17 miles north of Harrison. 

 The male was found under a timber at the tunnel on the line of the Bur. 

 lington & Missouri R. R., south of Crawford, in Dawes Co. 



Udeopsylla compacta n. sp. — About the size of Daihinia^ brevipes 

 Hald., to which it bears a very striking resemblance ; but is darker coloured 

 than that insect, and at once distinguishable from it in having the tarsi of 

 anterior and posterior legs four-jointed instead of only three-jointed. 

 The posterior femora of this insect also lack the heavy spines that are so 

 characteristic of the other. 



Legs short and heavy, the posterior femora in the male very similar to 

 those of the female, very minutely spined below ; the posterior tibiae not 



*The genus Daihinia is based on the abnormal number of tarsal joints in the 

 anterior and posterior feet, where there are three instead of four. Haldemann's type 

 was not an unique in that respect. I have fully a dozen specimens all of the typical form. 



