.^70 TAOR sK()(isr.i;it(; 



male first anteima. Tlie original seventh and eighth joints are strongly, presumably completely 

 immoveably, united to each other; the original boundary between them can, however, be clearly 

 observed. The proportions between the joints seem to be subject only to slight variation; 

 the conditions in the forms investigated hy me were about as follows (the figures are taken 

 from measurements of PJi. (Ph.) (jlohosa): 



V- II'"- III ^ • IV - • V ^ • VI - 



12' 11 ' :', *• 7 ' ij ' L 



With regard to the equipment of bristles on this antenna a rather slight amount of 



variation was observed in the species dealt with in this treatise. On account of the imcertaint}* 



of the statements in the literature attention is paid below only to the conditions in these species 



that I have verified myself. The second joint has three bristles, all situated near tlie ilistal 



boundary of the joint, one anteriorly, one posteriorly and one laterally. The third joint has 



one bristle distally -posteriorly and a somewhat varying number (from two to four were observed) 



situated in most cases distally-anteriorlv. The fourth joint has four bristles distally-posteriorly 



and one or two bristles distally- anteriorly. The original fifth joint is quite without the sensory 



bristle that is characteristic of most other genera of this famil}-. All the bristles mentioned so 



far, like that on the original sixth joint, are of about the same type: They are of the ordinary 



type, with short hairs distally and furnished in most cases with one or more wreaths of long, 



stiff secondary bristles near the middle; in some cases, often not quite constantly, the long 



secondary bristles mav be missing on one or two of these bristles; the length of these bristles is 



somewhat different in different species. On the end joint eight bristles are to be observed, thus one 



more than on the seventh and eighth joints in the sub-family Cypridininae. Four of these bristles 



are situated on the original seventh joint, four on the original eighth joint. -The bristles on the 



former of these two joints are situated as follows: one is situated anteriorly, one medially and 



somewhat anteriorly, two posteriorly. The anterior one of these bristles is of the same type 



as the bristles on the preceding joints. The medial one is a typical sensory bristle; it is about 



as long as the anterior sides of the second and third joints; it is powerfully annulated proximally, 



the annulation becomes weaker distally and may even almost disappear; on its anterior side 



this 1)ristle has a few very fine sensorial filaments, of equal thickness throughout, hyaline or 



only weakly and finely annulated and bare; distally these sensorial filaments are somewhat 



rounded and provided with a short, fine (sensory?) hair; one or two of these filaments were 



observed near the middle of the bristle and three close together near its distal point. The two 



posterior bristles of the original seventh joint are of about the same type as the last-mentioned 



bristle, but dift'er from it by having a somewhat larger number of anterior sensorial filaments: 



five to seven proximal ernes and four distal ones were observed. The four bristles of the original 



eighth joint have the same positions as in the sub-family Cypridininae. All four are subequal 



or dift'er only very slightly in length; they are about as long as the two posterior bristles of the 



oi'iginal seventh joint. The two that are situated close to each other laterally are simple, rather 



nariow, of about e(]ual thickness throughout, bare, rather finely annulated sensorial filaments 



as in the sul)-latnil\- just mentioned. The two bristles that are situated more medially are of 



the sanir t\'i)<' as the two nostciior tines on the (iriuinal seventh joint; on the anterior one ol 



