( fi^'^ ) 



IT. Ceratophyllus tristis (PI. XI. fig. 4.5. 47). 



Typhlopsylla tristis Rothschild, FMt. Rec. xii. p. 36. t. 2. f. 1 (lOOi)). 



This is one of the species whicli stand intermediate between Cerafciphijllus 

 and Ctmophtl/almus (= Ti/plilopstjllrt). Alter a more exhaustive stud}' of the 

 species allied to ('. tristis, we find that C. tristis is better placed in the geuns 

 Ceratophyllus than in ( Typhlopsylla = ) Ctenojjhthalmus, at least for the present. 



We here take the opporttmity of supplementing the original description given 

 in the Knt. liec. 



Head. — There are no genal spine?. What is called in the original description 

 a spine placed anterior to the antennal groove is the vestige of the eye. Segments 

 1 and 2 of the maxillary palpns are the same in length, being a little shorter 

 than the fourth and much longer than the third. The rostrum reaches to the 

 end of the forecoxa. The labial palpns consists of five segments, which are nearly 

 equal in length, the second and third being only a little shorter than the others. 



Thorax. — The metathoracical epimerum bears seven or eight bristles (3.3.2 

 or 3.2.2). 



Abdomen. — The first abdominal sternito (PI. XI. fig. 45. ?) bears iu the ? 

 a great number of small hairs on the lateral surface, and about five long ones. 



Legs. — There are two bristles posteriorly at the apex of the hiudcoxa. They 

 stand widely sejiarate from one another, the second being very small. On the 

 fifth tarsal segment there are four bristles on each side, besides a subapical hair. 

 The segment bears, moreover, on the ventral surface, a subbasal pair and a 

 thinner apical pair. 



The eighth tergite of the ? is represented by fig. 47 on PI. XI. The 

 eighth sternite (viii. st., PI. XI. fig. 47) bears some bristles at the apex- 

 The bristles of the anal tergite of the ? are short ; those standing in the middle 

 of the anal sternite are long and close together. The stylet is conical, being more 

 than twice as long as broad. 



18. Ceratophyllus thomasi spec. nov. (PI. XL fig. 46. 48). 



Head. — The head is slightly rounded, and is nearly the same in both sexes, 

 being only a little more rounded in the i than in the ¥. There is a row of fine 

 bristles between the antennal groove and the maxillary palpus, and beneath this row 

 another row of three longer ones, the uppermost of which stands at the antennal 

 groove. On the hinder part of the head there is a subapical series of bristles, 

 a single bristle above the antennal groove, and an oblique row placed anterior 

 of these. The first and second segment of the maxillary palpus are of the same 

 length, while the third is shorter and the fifth a little longer than the first. The 

 rostrum reaches to the end of the forecoxa. The labial palpus consists of five 

 segments. 



Thorax.— The short prouotum bears one row of bristles and a comb of twenty- 

 two teeth. The mesonotnm bears also one row of bristles, but has in addition 

 some hairs before this row, and some short spine-like hairs at the base, besides a 

 hair-like spine before the apex. On the metanotum there are two rows of bristles. 

 The metathoracical epimerum bears seven bristles (3.2.2). 



Abdomen. — The abdominal tergites 1 to 6 bear two rows of bristles, the 

 anterior row being very much reduced, and the second row consisting of four 

 bristles on each side. On the seventh tergite the first row is vestigial iu the $, 



