NO. 1361. REVISION OF AMERICAN SIPHONAPTERA— BAKER. 425 



Me.sonotiuii Avith a slno-le row of about twelve bri.stle.s. Motaiiotum 

 with a row of a])out twelve laroer bristles, and behind this, on either 

 side, thi-ee smaller ones. Metathoraeie epiphysis with one laroe In-istlc 

 posteriori}', two anterior to this, and one small, short one in front of 

 the latter. First abdominal tergite Avith a sinole small tooth on either 

 side, second with three on either side, third with two. and fourth with 

 one on either side. Abdominal tergites each with a transverse row of 

 ten bristles, and on the first two or three segments a second row of 

 one to three bristles on a side. One stout antepygidial l>ristle mounted 

 on a tubercle on each side. Middle a))dominal sternites each with a 

 single row of six bristles. 



Lateral portion of ninth tergite greatly enlarged and triangular, 

 long-pointed backward. Upper claspers rather small, not extending 

 l)eyond tip of prolonged portion of ninth tergite, somewhat spatulate, 

 the inner u})per angle acute, the- outer upper angle broadly rounded, 

 the hind margin with six to eight bristles; on the inside at liase there 

 is separated a short, broad, acute piece like a large tooth. 



Hind coxa" with a group of short stout bristles on in.side, resembling 

 the similarly grouped teeth in Pulex. Hind femur with a single bris- 

 tle on inside. The tirst joint of the hind tarsi has four groups of 

 spines on either margin; the apical spines on the second joint are 

 shorter than the third joint. The fifth tarsal joint on first and second 

 tarsi have five spines on either margin as in typical <\ raf<)]>hiiJJiix^ 

 while on the fifth joint of hind tarsi there are ))ut four on either mar- 

 gin as in PuJe.c. Lengths of hind tarsal joint in the proportions 

 23-15-10-5-12. 



Length, 2.25 mm. Color, pale l)rown. 



Ti/pe.—Odt No. 6!»23, U.S.N.M. 



Genus ANOMIOPSYLLUS, new genus. 



This genus is founded on an insect Avhich I described in 1898 as 

 T[iphh>psijUanuilata. It then dropped into that convenient "catch- 

 air' Typhi opxijUn., on account of its lack of eyes, though it was 

 remarked at that time that it represented a distinct genus. One of 

 the most conspicuous characters is the great length of the maxillary 

 palpi, which exceed the fore coxte. The eyes are wholly wanting. 

 On th(> dorsal line the pronotum and mesonotum are of equal length, 

 while the metanotum is shorter. There is a remarkable and wholly 

 uni(|uc reduction in the \estiture, the body, excepting the pt)sterior 

 extremity, being almost wholly nude, and the number of spines on the 

 legs greatly reduced, there being but four pairs of spines on the pos- 

 terior margin of the ti))ia\ One of the most important characters is 

 found in the rounded emargination formed distsiUyon the hind margin 

 of fore and middle coxa> at the junctuin^ of the coxa and its epiphysis. 

 In most fleas this is shallow or wanting, with the outer subtending 



