SYSTEMATIC TREATMENT 41 



area about the penultimate cerarii as well as about the anal lobe pair. It also 

 somewhat resembles P. quercicolus n. sp., from which it differs in the same man- 

 ner as from P. comstocki and further by the presence of a chitinized ventral area 

 on the anal lobes. 



Pseudococcus comstocki (Kuwana). 



Plate 1, fig. 2. 

 1902. Dactylopius comstocki Kuwana, Proc. Calif. Acad. Sci., (3) 3:52. 



In life. Almost identical with P. maritimus (Ehrh.), the lateral tas- 

 sels short and slender, the caudal pair one-third or one-half the length of 

 the body. Ovisac not seen. 



Morphological characteristics. With seventeen pairs of cerarii, of 

 which the first six or seven pairs have three or four conical spines, the 

 remainder having but two. The spines of the anal lobe cerarii are con- 

 siderably larger than any of the others. Lateral cerarii with three or 

 four auxiliary setae and a small cluster of pores. Anal lobe cerarii sur- 

 rounded by a large, oval, chitinized area, which is attenuated posteriorly, 

 extending back to the anal lobes, and which bears several slender setae 

 and numerous pores, the latter showing some tendency to concentrate 

 about the cerarian spines. Ventral side of the anal lobes with a small, 

 but constant, triangular, chitinized area extending in from the base of the 

 anal lobe setae. Dorsal body setae numerous, slender and rather long. 

 Triangular pores very abundant over the body, mingled with many tubu- 

 lar ducts, of which the majority are without a raised rim about the mouth. 

 Anal lobe setae about equaling anal ring setae or perhaps a trifle longer. 



Immature female in general resembling the adult female. 



Type host and locality. From mulberry, Akabane, Japan. 



Hosts and distribution. Not previously recorded from the U. S. I 

 have specimens taken by Professor Doane from mulberry and maple on 

 Staten Island, N. Y., and also specimens from Pinus radiata on the 

 campus of Stanford University. 



Authentication. Type specimens examined. 



Notes : It is reasonable enough to find this species on mulberry and maple 

 in Japan and on the same hosts in New York, for we need only assume that it has 

 been introduced on one of these hosts, but it is somewhat difficult to believe that 

 the species taken from pine in California is the same. However, I can find not 

 the slightest ground upon which to effect a separation and I do not propose to 

 brave the pitfalls which one will surely encounter if he disregard the evidence of 

 morphology and venture to discriminate between species upon the shifting and 

 inconsistent basis of hosts and biology alone. 



I have taken this species in California only upon Pinus radiata upon the 

 Stanford campus, where it is quite common, although by no means abundant. 



This is very near P. citrophilus Claussen, from which it differs only in the 

 absence (in life) of the longitudinal rows of impressed dots on the dorsum and 

 the absence of a chitinized area about the preanal cerarii. 



