Head. -The head (fig. 1. c?) is somewhat longer than it is broad, and bears a row of short stout sjiiue-Iike hairs between the upper end of the anteunal groove and the ventral corner of the frons. The frons is much more strongly curved in the male than in ihe/emale. The hinder portion of the head is hairy above. It bears also numerous short hairs at the sides above the antennal groove. A hair above the hinder ventral corner, another iu the middle above the antennal groove, and four others situated in front of the eye are long and stout. The palpus is considerably shorter than the rostrum.Thorax. -Tlie pronotal comb (fig. 1) consists of twenty-two teeth. The mesonotuni is densely clothed with numerous short hairs, in addition to tlie ordinary row of bristles. The epimerum of the uietathora.x bears one bristle on its hinder edge, and a row of three or four more situated immediately below the stigma. In addition to these the epimerum bears a few scattered hairs on the proximal portion of its surface.Abdomen. -The first three abdominal tergites bear a small spine on each side. The seventh tergite has on each side three apical bristles, two long and one short, the latter being the most ventral of the three.The abdominal sternites 2 to 7 have three hairs on each side.Legs. -The anterior femur bears numerous fine hairs scattered over its outer surface. The foretibia is short, and ventrally and dorsally rounded (in optical section), the bristles on the dorsal edge being very numerous, but not long. The first segment of the tarsus is about half as long as the tibia, with seven pairs of long thin bristles on its dorsal edge.The midtibia bears ten [lairs of long thin bristles on its dorsal edge, and two subdorsal rows of hairs on the outer surface and a number of ventral bristles as well.The first segment of the midtarsus is half as long as the tibia and very densely covered with hairs.The jiosterior tiida bears on its outer side two subdorsal series of hairs and iiuiuerous ventral bristles ; on the inner side onlj' one row of hairs is ])resi'nf. The tibia, moreover, bears thirteen or fourteen \mm of bristles on the dorsal edge. The first segment of the hindtarsus is about tlu'ee-(iuarters tlie length of the tibia, 23

No abstract

The importance of certain species of fleas in relation to the epidemiology of plague has been so amply demonstrated (see Journal of Hygiene, vols. vi. 1906, p. 426 and vii. 1907, p. 395) that an explanation appears scareely necessary for our publishing a paper dealing with a revision of the non-pectinated eyed Siphonaptera. With the demonstration that fleas are capable of transmitting plague, their study at once ceased to be the mere hobby of a small group of entomological specialists. An accurate knowledge of fleas, both with regard to their structure and biology, is at present a matter of prime importance to those who concern htemselves with the prophylaxis of plague.

No abstract

On the 8th, T"ai-yuan Fii was reached, but observations were kept up till the i2th, when the expedition officiall}' came to an end.