NO. 1417. RE VISION OF A MERICAN SIPHONAPTERA— BAKER. 135 



JJ. Claspers of male with bristles in one small group of five near 

 the upper end; metatarsal article I with three 

 groups of spines on dorsal margin and five ou 

 ventral braneri 



II. Claspers of male large and very long, of a sickle-shaped type; 

 metatarsal article I with but four groups of spines 

 on ventral margin. 



J. Length :!-8.5 mm., pale brown; metatarsal article I wjth 

 groups of spines 4-4 in female, the whole article 

 about equaling II and III together aciilns 



JJ. Length L75-2.75 mm., dark brown; hind tarsal article I with 

 groups of spines 4-5 in female; the whole article 

 shorter than II and III together montanus 



Genus CTE NOPHTH ALMUS Kolenati. 



1893. Ti/p}dojmjIl(i Y)Sirt Bezzi, Rev. Ital. Sci. Nat. y Bull. Nat., XIII, p. 137. 



1903. Tiiphlopsylla Wagner, Hora? Soc. Ent. Ross., XXXVI, pp. 138, 140. 



1903. Typhlopsylla part Kohaut, Magyar, bolhai, p. 53. 



1904. Typhlupsylla Tiraboschi, Archiv. de Parasit., VIII, p. 285. 



SYNOPSIS OF AMERICAN SPECIES. 



A. Head ctenidia of two superposed spines on either side; size very large. 



B. Genfe lobed; prothoracic ctenidium of twelve spines ivenmanni 



BB. Gena? not lobed; prothoracic ctenidium of twenty spines.. ..7 (V/«.s and grandis 

 AA. Head ctenidia of three to five spines on either side; size small. 

 B. Spines of head ctenidia in nearly longitudinal rows on lower margins of gena\ 



C. Head ctenidia of three spines each pscudagyrles 



CC. Head ctenidia of four spines each anllquorurn 



BB. Spines of head ctenidia in vertical rows on hind margins of gena'. 



C. Spines of head ctenidia very similar in shape; pronotal ctenidium of 20-22 

 spines. 

 D. Head ctenidia each of four spines; head evenly rounded in front; front 



with a marginal row of si.x bristles on each side inlermedlHi^ 



DD. Head ctenidia each of five spines; head angulate in front; front without 



marginal bristles frati'rmts 



CC. Spines of head ctenidia very dissimilar in shape; pronotal ctenidium of about 

 twenty-eight spines yenulh 



Genus NEOPSYLLA Wagner. 



1903. NeopmjUa Wagner, Hora- Soc. Ent. Ross., XXXVI, pp. 138, 140. 



1904. Neopsylla Tiraboschi. Archiv. de Parasit., VIII, p. 292. 



Genus PAL^^OPSYLLA Wagner. 



1903. PaLropsylla Wagner, Hora? Soc. Ent. Ross., XXXVI, pp. 137, 140. 



1904. Pahwpsylla Tiraboschi, Archiv. de Parasit., VIII, p. 294. 



Genus TYPHLOCERAS Wagner. 



1003. TypJdoceras W AGSER, Hora; Soc. Ent. Ro.«s., XXXVI, p. 152. 

 1904. Typhloceran Tiraboschi, Archiv. de Parasit., VIII, p. 295. 



S«l3 family noi^iCHOPSYLLiisrjn::. 



Genus DOLICHOPSYLLA, new. genus. 



This new genus and new jsubfamily are erected for the reception of 

 the very remarkable Ceratopliylhm i<tyJosus. 



