COCCIDAE FROM LOWER CALIFORNIA 91 



Morphological characteristics. Derm membranous throughout. An- 

 tennae (Fig. 13B) very short and stout, apparently 5-segmented, but the 

 segmentation very obscure. Legs (Fig. 13D) likewise very short and 

 stout. Marginal spines very few, small and slender. Stigmatic depres- 

 sions (Fig. 13E) each with three short, stout spines of practically equal 

 length and connected with the corresponding spiracles by a broad zone of 

 pores. Anal plates (Fig. 13A) large, the cephalo-lateral margin much 

 longer than the caudo-lateral margin. Each plate with four or five apical 

 and subapical dorsal setae and with five ventral subapical setae. On each 

 side there is a single stout fringe seta and there are several hypopygial 

 setae. On the dorsum anterior to* the anal plates are numerous pores of 

 the type indicated in Fig. 13C. 



Notes : In spite of the development of an ovisac this species is a Towney- 

 ella. 



Toumeyella mirabilis Ckll. 



1919. Toumeyella mirabilis Ckll., Ferris: "Contribution to the Knowledge of the 

 Coccidae of Southwestern United States," Stanford University Publica- 

 tions, p. 44, fig. 21. 



Previous records. From Prosopis in Arizona and Mexico. 

 Lower California records. From Prosopis sp. at La Paz. 

 Notes : The Lower California examples differ from typical specimens in 

 having the dorsal white markings much larger, in some the white being so ex- 

 tensive that the insect is really white with black markings. 



Genus PROTODIASPIS Ckll. 



Protodiaspis lagunae n. sp. 

 Figs. 14, 15. 



Type from Quercus brandegeei at Triunfo. Also from the same host 

 at Santiago and La Laguna. 



Habit. Occurring in crevices of the bark. Scale of female more or 

 less circular, less than 1 mm. in diameter, variable in size and form in 

 conformity with its environment, quite high convex, normally well 

 formed, but in certain cases where the insect is deeply buried in a crack 

 the scale is composed merely of loose threads. Scale of male elongate, 

 white, non-carinate, with the exuvium at one end. 



Morphological characteristics. Adult female .5-.6 mm. long, form 

 rather broadly oval; derm membranous throughout except for a slight 

 chitinization of the pygidium and sometimes of the anterior portion of 

 the body. Pygidium (Fig. 14) with two pairs of weakly chitinized lobes 

 which are frequently very obscure ; with a few very minute and scattered 

 dorsal ducts and with the circumgenital pores present in five groups 



