Family Hystrichopsyllidae Tiraboschi 91 



Nearctopsylla genalis (Baker) 

 (Plate XXIII, figs. 116, 120, 121) 



1904 Ctenophthalmus genalis Baker, Proc. United States Nat. Mus., 27:424. 



1904 Ctenvpsyllus hygini Rothschild, Nov. Zool., 11:650, PL XV, fig. 85; 

 PI. XVI, figs. 93, 94. 



1905 Ctenophthalmus genalis Baker, Proc. United States Nat. Mus., 29: 135. 

 1914 Ctenopsylla gejialis C. Fox, United States Public Health Ser. Hyg. 



Lab., Bull. 97, PI. XV, fig. 25; PI. XX, fig. 56. 

 1923 Ctenophthahnus genalis Dunnam, Ent. News, 34:219. 



Male. Front of head flattened and more or less vertical. 

 Preantennal region with a row of five bristles extending 

 obliquely anteriorly from the dorsal region of the antennal 

 groove. Frons with a long bristle close to the anterior border 

 and opposite the third genal spine. Genal ctenidium with five 

 spatulate spines. First ctenidial spine shortest, the middle three 

 longest; fifth spine truncate, the others more or less acuminate. 

 Labial palpus extending to three-fourths the length of the 

 anterior coxae. Postantennal region of the head with three 

 rows of four to six bristles each. Pronotum armed with a single 

 row of bristles and a pronotal ctenidium of thirteen or fourteen 

 spines on a side. Meso- and metanotum each with one or two 

 rows of bristles. Each abdominal tergite with a marginal row 

 of long bristles. The anterior tergites may have, in addition, an 

 anterior row consisting of a few short bristles. First four ab- 

 dominal tergites further armed with one or two short, stout 

 teeth on a side. One stout antepygidial bristle mounted on a 

 tubercle on each side. Modified segments: Clasper armed 

 apically with a number of bristles of various sizes, and on the 

 inside surface with many small setae. Movable finger armed on 

 the posterior margin with four or five long bristles and a few 

 short ones. Manubrium small, curved, tapering to a delicate 

 point. Penis broad and heavy, curved distally and ending in a 

 sharp point; spring long, not completing a turn. Sternite IX 

 with a brush of seven or eight bristles on the posterior margin. 

 For further details concerning the structure of the male geni- 

 talia, see Plate XXIII, fig. 121. 



Female. Chaetotaxy of the head essentially as in the male 

 (Plate XXIII, fig. 116) . Two long antepygidial bristles present 

 on a side. Sternite VII divided into two lobes by a wide sinus, 

 the upper lobe more prominent than the lower. Tail of the 

 receptaculum seminis very long and wide. For further details 

 concerning the structure of the female genitalia, see Plate 

 XXIII, fig. 120. 



