SYSTEMATIC TREATMENT 47 



On the basis of hosts this might be P. aphyllonis Ckll. which is recorded from 

 Orobanche (Aphyllon) fasciculatum at Wentachee, Wash., but Mr. Morrison has 

 furnished me with a sketch of the type of that species which proves that the two 

 are quite different. The description of P. formicarii Ehrh. suggests some resem- 

 blances to that species. 



Pseudococcus longispinus (Targ.). 

 Text figure 13 ; plate 1, fig. 4. 



Note : The literature and synonymy of this species are so extensive that it is 

 hardly desirable to present them here. 



In life. Remarkable for the unusual development of the lateral and 

 caudal tassels, those on the margins of the body equaling in length nearly 

 half the width of the body and the caudal pair being at times actually 

 longer than the body. Oviparous, the ovisacs more or less loose and 

 elongated. 



Morphological characteristics. Seventeen pairs of cerarii present, 

 the first three or four pairs of these with three or four conical spines, the 

 remainder with two. These increase gradually in size toward the pos- 

 terior end of the body until the penultimate pair are reached and of 

 these the spines are much larger than any preceding, while those of the 

 anal lobe pair are still larger, being extremely stout. All of the cerarii 

 with auxiliary setae and numerous pores. In the anal lobe and penulti- 

 mate pairs the pores are concentrated into a crowded circular area about 

 the cerarian spines. Penultimate cerarii surrounded by a circular chitin- 

 ized area and the anal lobe pair by a large well-defined oval area. Ven- 

 tral side of the anal lobes with a large, triangular chitinized area with the 

 apex directed forward and with a narrow thickening along its median 

 edge. Dorsal body setae few, slender. Triangular pores not numerous, 

 intermingled with scattered tubular ducts of which a few have a raised 

 rim about the mouth. Anal lobe setae shorter and more slender than 

 anal ring setae. 



Immature females differing from the adult chiefly in a slight reduc- 

 tion in the number of pores. 



Hosts and distribution. Upon a very considerable range of hosts, 

 out of doors in the southern part of the state. In the bay region it occurs 

 only in greenhouses, where it chiefly infests ferns. 



Authentication. Common repute. 



Notes: The characters of the anal lobes are such that this species can 

 hardly be confused with any other found in the state. I do not propose to enter 

 into the discussion as to whether this should be called longupinus or adonidum. I 

 retain the better known name. 



