COCCIDAE FROM LOWER CALIFORNIA 101 



Second stage with pygidium as in the adult except for the almost 

 entire absence of dorsal ducts. 



First stage with the antennae (Fig. 21 E) 5-segmented, the terminal 

 segment somewhat elongate and slightly annulate; pygidium (Fig. 21B) 

 with a single pair of rather large lobes and with several small gland spines. 



Notes: In spite of the presence oii circumgenital pores I regard this species 

 as strictly congeneric with P. larreae. 



Pseudodiaspis multipora Ferris. 

 1919. Pseudodiaspis multipora Ferris, Ent. News, 30:275. 



Previous records. From Phoradendron ftavescens on oak in south- 

 ern California. 



Lower California records. Abundant on mistletoe on Cercidium 

 throughout the area visited. 



Notes : In the original description (which was based upon but two speci- 

 mens) it was stated that the derm was membranous throughout. The examination 

 of more material shows that the cephalothorax tends to become quite heavily 

 chitinized at maturity. 



Pseudodiaspis yuccae (Ckll.). 



1919. Pseudodiaspis parkinsoniae (Ckll.), Ferris: "Contribution to the Knowl- 



edge of the Coccidae of Southwestern United States," p. 56, fig. 30. 



1920. Pseudodiaspis yuccae (Ckll.), Ferris: Can. Ent., 52:64. 



Previous records. From Yucca, Celtis, Acacia, and Cercidium 

 (= Parkinsonia) in southwestern United States. 



Lower California records. From Cercidium sp. at San Antonio, 

 Celosia floribunda ("bledo") at San Bartolo and Miraflores, and Sim- 

 mondsia calif ornica at La Rivera. 



Pseudodiaspis ruelliae n. sp. 

 Fig. 22. 



Type from Ruellia sp. ("rama prieta") at Cabo San Lucas. Also 

 from the same host at Todos Santos. 



Habit. Occurring on the leaves associated with a curling that is 

 probably due to the presence of the insect. Scale of the female circular, 

 about .75 mm. in diameter, slightly convex and of a distinctly yellowish 

 color ; exuviae subcentral, the first naked, the second covered with secre- 

 tion; ventral scale quite thick. Scale of male white, elongate with an 

 obscure median carina and with the exuvium at one end. Frequently 

 many males are to be found massed about a female, and in this case many 

 long, curling threads of wax arise from the mass. 



Morphological characteristics. Adult female 1 mm. long, of the 

 usual turbinate form, the thorax not separated from the abdomen by a 



