434 ENTOMOLOGICAL NEWS. [Nov. ,'08 



abundance. The gap in the known distribution of these two 

 species is thus over 500 miles. The overflow from the lake is 

 a small stream averaging when I saw it 2 or 3 feet in width. 

 Its length from the lake to its mouth in the Poteau River 

 is possibly half a mile. A short distance below the lake, in 

 passing some bushes which overhung the stream bed, I dis- 

 turbed the only specimen I saw alive of P. xanthosoma. This 

 flew a short distance along the stream and alighted in a well 

 concealed spot in bushes overhanging the water. Its flight, 

 manner of alighting and position at rest suggested a teneral 

 Libellula. The specimen taken by Frank Collins is somewhat 

 worn ; he wrote on the envelope "Yellow one." His home in 

 1907 was a camp along the Poteau River and his collecting was 

 done along the river, at the lake and at intermediate points. 



Professor Walker has recorded the interesting fact that N. 

 yamaskanensis is entirely crepuscular in its habits, spending 

 only a brief period of the day on the wing. It is not improbable 

 that N. obsoleta and P. xanthosoma similarly are abroad only 

 in the evening. 



Ceratophyllus niger n. sp. (Siphonaptera). 



BY CARROL Fox, P. A. Surgeon, P. H. and M. H. S., 



San Francisco. 



Female. Head gently rounded to frontal notch which is distinct. 

 Three stout bristles in lower genal row; three more slender in upper 

 row. Genae acutely pointed posteriorly. Eyes oval. About nine hairs 

 on second antennal joint, longer than third joint. One large bristle on 

 disc of vertex behind middle of antennal groove. The usual bristles on 

 hind margin of head and one large one at lower angle. Numerous min- 

 ute hairs along posterior margin of antennal groove. Labial palpi five 

 jointed and extend almost to end of anterior coxae. Maxillae triangular. 



Thoracic nota with two transverse rows of bristles ; the principal 

 with about eight bristles. Ctenidium on prothorax of about twenty- 

 six spines. Second, third and fourth abdominal tergites with two 

 stout teeth, fifth with one tooth on each side. Two rows of bristles 

 on abdominal tergites, the posterior row consisting of about twelve 

 bristles ; the anterior row fewer in numbers and smaller, and irregularly 

 disposed. Abdominal sternites with one row of about eight bristles. 

 A few smaller along median line on ventral surface. Style slender with 



