Family Ischnopsyllidae Wahlgren 105 



ctenidium formed by the thickening of the dorsal bristles. One 

 antepygidial bristle present on a side. 



This genus is represented in the East by a single species, 

 which is our commonest bat flea. 



Myodopsylla insignis (Rothschild) 

 (Plate XXIX) 



1903 Ceratopsylla insignis Rothschild, Nov. Zool., 10:319, PL 9, figs. 8-12. 



1919 Myodopsylla snbulata Chapin, Bull. Brooklyn Ent. Soc, 14:55. 



1921 Myodopsylla insignis Jordan and Rothschild, Ectoparasites, 1: 151, 



figs. 129, 130. 

 1928 Myodopsylla insignis Stewart, Cornell Univ. Agric. Exp. Sta.. Mem. 



101, p. 869. 



1928 Myodopsylla insignis Jordan, Nov. Zool., 34: 188. 



1929 Myodopsylla insignis Jordan, Nov. Zool., 35:177. 



1933 Myodopsylla insignis Stewart, Jour. New York Ent. Soc. 41: 259. 

 1937 Myodopsylla insignis Jordan, No". Zool., 40:285. 



Female. Frons with a wide clear area taking up most of the 

 anterior region of the head. Dorsal region of this clear area 

 with three unequal bristles. A series of four or five stout 

 bristles near the anterior border of the antennal groove; gena 

 with a number of small setae. Spines of the genal ctenidium 

 broad, the posterior somewhat wider and extending more 

 distad than the anterior. Genal process pointed. Labial palpus 

 short, reaching to about one-fifth the length of the fore coxa. 

 First segment of the antenna with about five small setae 

 apically; second antennal segment with about five short bristles. 

 Along the posterior edge of the antennal groove is a series of 

 about eleven small setae. Postantennal bristles arranged in four 

 rows; first row with two bristles, second and third with about 

 five each, fourth or marginal row with about six. Pronotum 

 with a ctenidium consisting of eighteen to twenty-one spines on 

 a side. Each segment of the thorax armed with three irregular 

 rows of bristles. Sternite VII without a sinus. Head of the 

 receptaculum seminis about as wide as long, rounded dorsally. 

 For further details concerning the structure of the female 

 genitalia, see Plate XXIX, fig. 151. 



Male. Chaetotaxy of the head slightly different from that 

 of the female, the postantennal bristles being less regularly 

 arranged (Plate XXIX, fig. 152) . Modified segments: Clasper 

 forming a lobe whose apex bears five to seven bristles. Movable 

 finger more or less trapezoidal in shape with a corner produced 

 into a terminally rounded process which bears a number of 

 small setae (Plate XXIX, fig. 156). Paramere of the penis 



