475 



which are shown in fig. 1. The othc^ two are modifications of the 

 variety h. 



It may be questioned whether a can, proi>erly speaking, be con- 

 sidered an example of extra joint, but there is no doubt, of it^ being, .a 

 malformed one. ^...q- .,..;, .. , ^. 



The two joints are situated near the middle of the worm and are 

 only about one-half the size of the other joints of this region. The 

 posterior one of the two is impressed by a shallow longitudinal groove 

 which divides it, on one side, into two nearly equal lateral halves. 

 There is no distinct articulation present, and the genitals, which are 

 not readily distinguishable, appear to fill the interior of the joint. 



The second example of supernumerary joint, fig. 1 i, occurs a 

 short distance beyond the one just described. It has the form of a 

 heart, and is wedged in between two others of about equal size. It 

 possesses a perfectly distinct generative apparatus, the genital opening 

 being very near the centre of the free edge. 



Another interesting anomaly, found also in this worm, is shown 

 by fig. 2. It consists of a sexually-mature segment, situated about one 

 metre from the posterior extremity, which is so bent as to form a right 

 angle. The position of the genital pores is shown in the figure. The 

 interior of the joint is completely filled by the genitalia. When the 

 chain is straightened the outer expanded portion becomes folded on 

 itself. 



Amherst, Mass., U. S. A., 21 June 188S. 



2. Dufteinrichtungen indischer Schmetterlinge. 



Von Dr. Erich H a as e in Dresden. 



eingeg. 11. Juli 1888. 



Über bestimmte, von indo-australischen Schmetterlingen ausge- 

 strömte Gerüche sind bisher erst verhältnismäßig wenige Beobach- 

 tungen an lebendem Material gemacht Avorden. ;, -',,.. 



Vor Allem sei hier der stechende, halb aromatische, starke Duft 

 der Danaiden, besonders der Gattungen Danais und Euploea, erwähnt. 

 Derselbe gehört zu den Widrigkeitsgerüchen, welche beiden Ge^ 

 schlechtem gemeinsam sind, besonders bei der Verfolgung und Be- 

 rührung der Falter deutlich hervortreten und die Art vor den An- 

 griffen insectenfressender Vögel schützen. Dieser eigenartige Duft der 

 Danaiden hat nach Marshall und Nicéville^ seine Quelle in der 

 Ivörjierflüssigkeit, welche so scharf ist, daß sie auf der menschlichen 



» Marshall and NicéviUe, Butterflies of India. Calcutta, 1882. p. 22, 



