368 



THE CANADIAN ENTOMOLOGIST. 



Collected by the author on Quercus lobata, Yulupa Valley, Sonoma 

 County, California. 



Odonaspis graminis, n. sp. — (Fig. 23.") This coccid is found on the 

 roots of grass, and is very easily detached from the host plant. It has 

 much the appearance of a clam, ranging in form from mytiliform to round, 

 and is dirty-white in colour, and i to 132 iii'^i- 'ii size. The exuvia is at 

 one side, and at the anterior extremity is glossy straw-coloured. The 



Fig. 23. — Odonaspis yraminis. 



ventral scale is nearly as well developed as the djrsal, and has what 

 appears to be the ventral half of the exuvii at the anterior end. The 

 scales may be pried apart much the same as you would open a clam. 



The adult female is oval in form and yellow in colour. The segments 

 are distinct and chitinized at the margins with groups of dorsal pores. 

 There is a group of glands around each of the openings of the anterior 

 spiracles. The pygidium is broad and strongly chitinized. The lobes are 

 obsolete, and are represented by points in the centre of the suppressed 

 segments. The rudimentary median lobe is more pronounced than the 

 others, with a groove in the centre. There are two spines at each side of 

 the median segment and one on each of the second and third suppressed 

 segments. There are no groups of circumgenital gland orifices. The 

 dorsal pores are numerous and regularly pi iced, a double line at the 

 margin and a single line on each side of the segments. The anal aperture 

 is situated at some distance from the extremity. 



Habitat — This species was collected by E. M. Khrhorn o\\ the roots 

 of grass from the Presidio Hills, San Francisco, California, 



