442 Materials for a Monograph 



UDEOPSYLLA, Nov. gen. (oiJd 



This genus is to be placed between Ceuthophilus and 

 Daihinia. The body is heavier and stouter than in Ceu- 

 thophilus^ with a larger head; the form of the body is 

 that of Ceuthophilus; antennaB as in Daihinia; first joint 

 larger and stouter than the rest, as broad as long, com- 

 pressed anteriorly ; third joint twice as long as second ; 

 remainder unequal ; eyes small, subpyriform, docked on 

 the antennal border, globose; maxillary palpi rather long; 

 first and second joints equal and small ; third, more than 

 equal to the preceding together ; fourth, little more than 

 half as long as third ; fifth, a little longer than third, some- 

 what curved, split along the whole under side ; as in Ceu- 

 thophilus the pro- meso- and metanota nearly conceal the 

 epimera of the thoracic segments ; coxae differing but 

 slightly from Ceuthophilus ; hind femora very heavy, 

 thick, and especially broad, but not so much so as in Dai- 

 hinia^ where, as in this genus, the whole limb is swollen, 

 and not the basal portion only, as in the preceding genera ; 

 in the males the hind femora are spined beneath ; the fore 

 and middle femora are shorter and heavier here and in 

 Daihinia than in Ceuthophilus ; tarsi, with the first and 

 fourth joints equal and longest ; second and third equal and 

 small, the second overlapping the third above ; 

 t^^-^ ^ ne ovipositor is rather short, thick at base, slen- 



Fig. 2. der at apical half, terminating much as in Ceu- 

 thophilus. 



This genus differs from Daihinia in the longer, more 

 slender, less robust, and less spinous legs, in the some- 

 what more slender body and smaller head, in the shorter 

 maxillary palpi, and in the structure of the tarsal joints. 

 See figs. 2, 3. 



1. U. ROBUSTA. 



Phalangopsis (Daihinia) robustus, Hald., Proc. Am. Ass. 

 Adv. Sc.; 11.346. (1850.) 



