SYSTEMATIC TREATMENT 67 



6. Dorsum with short, broad, tubular ducts . villosa (Ehrh.) 

 Dorsum without such ducts 7 



7. Anal ring setae scarcely more than one-half the length of 



the anal lobe setae; antennae of adult female 7-seg- 



mented smithii (Essig) 



Anal ring setae equaling anal lobe setae ; antennae of adult 

 female 8-segmented bromi n. sp. 



Trionymus bromi new species. 



In life. Either in the axils or on the upper surface of the leaves. 

 Surrounded by a fluffy mass of cotton. 



Morphological characteristics. Antennae of the adult female 8-seg- 

 mented. But one pair of cerarii present, these on the anal lobes and con- 

 taining two short, sharp spines, two or three small setae and a very few 

 pores. Body setae few, inconspicuous, short, slender, curved. Body 

 with many triangular pores and small tubular ducts, and with a few mul- 

 tilocular pores on the dorsum of the abdomen. Anal lobe setae but little 

 if any longer than the anal ring setae. Anal ring rather small and heavily 

 chitinized. 



Immature female not observed. 



Type host and locality. From Bromus sp. Corte Madera Creek near 

 Stanford University, Calif. 



Hosts and distribution. From the same host on the road above Con- 

 gress Springs, Santa Clara County; from Ammophila arenaria on the 

 sand dunes near Golden Gate Park, San Francisco; from the bark of 

 Ericameria fasciculata (a composite) on the sand dunes near Pacific 

 Grove, Monterey County. 



Notes: This is quite abundant locally. I have but little doubt that it is a 

 described species, yet I can connect it with none and must give it a name. The 

 specimens taken from Ericameria had in all probability merely entered the crevices 

 of the loose bark in order to form their ovisacs and it is improbable that the 

 species feeds on this host. 



Trionymus calceolariae (Maskell). 

 1878. Dactylopius calceolariae Maskell, Trans. New Zealand Inst. 11 :218. 



In life. Concealed beneath the sheathing bases of the leaves of its 

 host, surrounded by masses of wax. 



Morphological characteristics. Antennae of the adult female 8- 

 segmented. Two pairs of cerarii present, the cerarian spines short, stout, 

 conical, not accompanied by grouped pores or auxiliary setae. Entire 

 body beset with many short hairs, of about equal length on dorsal and 

 ventral sides. Derm with many triangular pores and small tubular ducts 



