96 MISC. PUBLICATION 5 00, U. S. DEPT. OF AGRICULTURE 



The Genus Corypsylloides Hubbard 



Corypsylloides Hubbard, 1940, Pacific Univ. Bui. 37 (2) : 7. Monotypic. Type, 

 Corypsylla kolilsi Hubbard. 



Front reduced ; frontal tubercle and notch absent. Gena much enlarged ; 

 genal comb obliquely vertical, consisting of 6 spines of about the same length. 

 Eyes absent. Labial palpus 5-segmented, the terminal segment tapering dis- 

 tally. Pronotum rounded cephalad, well separated from head, bearing on posterior 

 margin a comb consisting of spines of various sizes. Mesopleuron not divided 

 by a vertical rodlike sclerotization into a mesepisternum and a mesepimeron. 

 Abdominal tergal plates armed with prominent apical spines but without 

 heavy transverse incrassations. Coxa III with a patch of spinelets on inner 

 surface. Last segment of each tarsus armed with 4 pairs of lateral plantar 

 bristles. 



This genus is most closely allied to Corypsylla C. Fox, from which 

 it may be distinguished by the absence of heavy transverse incrassa- 

 tions on the pbdominal tergal plates and by the character of the 

 genal comb. It is separated from Nearctopsylla Rothschild, which 

 it superficially resembles, by the structure of the thorax. The genus 

 is represented in North America by one described species. 



Corypsylloides kohlsi (Hubbard) 



Corypsylla kohlsi Hubbard, 1940, Pacific Univ. Bui. 37 (1) : [10], 7 figs. 

 Corypsylloides spinata I. Fox. 1940, Wash. Acad. Sci. Jour. 30: 373, tigs. 1, 2. 



Type host. — Sorex obseurus bairdi Merr. (Band's shrew). 



Type locality. — Cannon Beach, Oreg. 



Range. — Oregon. 



This species was well illustrated in the original description. The 

 movable finger, however, is shown to have but two setae on the 

 posterior margin. The specimens upon which I. Fox based the 

 name Corypsylloides spinata indicate three larger setae and two 

 minute ones, as is shown in his illustration. 



The Family Ischnopsyllidae Wahlgren 



Head divided into anterior and posterior parts by fronto-epicranial groove. 

 Gena neither greatly enlarged nor divided by a suture. Forehead without 

 helmet, usually elongated, and always with 2 or 3 ventral flaps on each side 

 adjacent to fronto-genal angle. Eyes reduced, vestigial, or absent. Cephalic 

 combs represented by the 2 or 3 flaps on each side of head. P >s?antennal 

 region with or without dorsal incrassations. Thorax not grearl: .educed; 

 thoracic terga taken together longer than abdominal tergum I. Typical ab- 

 dominal terga each with more than 1 transverse row of setae. Antepygidial 

 bristles present or absent. Abdominal apical spines frequently present and 

 may form 1 or more combs. True or false combs of long spines may be present 

 on abdomen. Females without a reduced number of abdominal spiracles and, 

 when gravid, abdomen not greatly distended. 



The family Ischnopsyllidae was established by Wahlgren (87, p. 

 89) in 1907. The following synonyms are recorded: Ceratopsyllidae 

 Baker (o, p. 137) and Ischnopsyllinae Wagner (SO, p. 20). Ceratop- 

 syllidae is based upon Ceratopsyllus Kolenati, 1857, which is a syno- 

 nym of Ischnopsyllus Westwood, 1883. 



Wagner (86, p. 75) has divided this family into two subfamilies. 

 The characters are: The presence or absence of a wide clear area 

 on the frons, the presence or absence of antepygidial bristles, and 

 the presence or absence of a comb of thickened bristles on abdominal 



