103 



with a double outline from above, and obtusely serrate around lateral margin of abdo- 

 men. In the five denuded specimens three have ten-jointed antennse, differing thus 

 from any other Icerya. In the two remaining specimens joint 6 is divided into two, 

 giving the normal number of eleven joints ; in one antenna of one specimen the di- 

 vision is only faintly indicated. The club is proportionately considerably longer 

 than in /. rosce, equaling the three preceding joints in length. Rolitrum plain ; 

 secretory pores extremely abundant, particularly under the lateral edges of the 

 abdomen ; no indication of cylindrical lipped pores or of the glassy filaments seen 

 in I. purchasi, and the dorsal honey-dew pore of the latter species is also apparently 

 lacking, although the insect undoubtedly secretes honey-dew as previously men- 

 tioned. All tarsi one-half the length of their respective tibi*. The w^axy secretion 

 is pure white in color and is dense and even over the dorsal surface of the body, 

 and appears to be arranged in an irregular double row of tufts around the border. 

 Certain of these tufts grow to an extraordinary length, particularly one which springs 

 from near the head and another arising from the anal end of the body. The latter 

 we have mentioned in our description of the third stage. Owing to the long journey 

 and insecure packing all of the adults in our possession appear somewhat damaged, 

 and our description of the arrangement of the secretion is doubtless very imperfect. 

 In one specimen, however, this anal tuft of wax reaches a length of over 20™™. The 

 ovisac closely resembles that of I. purchaax. It is about twice the length of the body 

 of the female in the specimens at hand, is regularly fluted, and about fifteen longi- 

 tudinal flutings are visible. The body of the female does not appear to be pushed 

 up so much by the growth of the sac as is the case with /. purchasi, and as a conse- 

 quence the sac shows a tendency to turn up rather than down. 



PALMER'S ICERYA. 



i Icerya palmeri n. sp. ) 



^^*^.v 



Fig. 18.^Icer7ja palmeri : a, cast skiua of larvae ot aecoud stajie— greatly enlarged; 6, same in situ on 

 grape leaf— natural size (original). 



In the winter of 1887-'88 Dr. Edward Palmer, the well-known botan- 

 ist, while working over his previous summer's collections in Washing- 

 ton, handed us a number of leaves of the Muscat of Alexandria grape- 

 9974— No. 3 2 



