102 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Bermuda grass is apparently the only grass in Hawaii suit- 

 able, and is practically the only grass used, for lawn purposes. 

 It is also well adapted for grazing purposes, especially on the 

 low lands, hence the insect depredation is of some economic 

 value. It is fortunate, therefore, that this scale is kept in check, 

 to a degree at least, by a parasite. This is a beautiful, tiny, 

 metallic green chalcidoid new to science both generically and 

 specifically, according to the late Dr. Ashmead. 



The writer was certain at the time that the coccid was unde- 

 scribed, and, though he had drawn up a description and prepared 

 drawings, failed to publish it, in the contemplation of publishing 

 a paper covering all the coccids of Hawaii, including descriptions 

 of all species found there new to science. As often happens, this 

 work was delayed until 1909. Meantime, the late Mr. Craw had 

 occasion to refer to the insect in writing to Mr. Ehrhorn, who was 

 then in California, and called it by my MS. name, and the latter 

 incorporated it in one of his reports. In this wise the manu- 

 script name got into print, but sine description. Meantime 

 also, Mr. Brsmner published in the Canadian Entomologist for 

 1908 a description of Odonaspis graminis, from grass in Cali- 

 fornia, which was so similar to the species in question, that the 

 author took them to be identical, especially since he received the 

 assurance of Mr. Ehrhorn to that effect. It was therefore referred 

 to by that name in Proc. Haw. Ent. Soc. II, 127. I have since 

 been advised by Mr. Marlatt that the species is distinct. Mr. 

 Sasscer, of the U. S. Bureau of Entomology was kind to supply 

 me with the slide he prepared from material originally sent to the 

 National collection of Coccidue. These were used for the following 

 description. 



Odonaspis ruthae, n.sp. 



Female scale: Oyster shaped or mytiliform when full grown, about 1.75 

 mm. long, 0.75 mm. wide; chalk white; exuviae at elevated end, partly or 

 entirely covered with white waxy dust which rubs off easily, straw colored. 

 Ventral scale well developed, with dorsal completely enclosing and seal- 

 ing insect. Male scale: Same shape, but only about half the size of fe- 

 male. Adult female: In balsam (fig. 1), irregularly circular; hyaline, 

 except gland-bearing margin of last 7 or 8 segments, including caudal 

 half of pygidium, and mouth parts, all of which are more or less heavily 

 chitinized. Diameter about 0.63 mm. Pygidium (fig. 2) viewed from head 

 toward median lobes looks like a very regular inverted outline of a bell, 

 the median lobes corresponding to the tongue, 0.36 mm. long over all, 

 0.315 mm. wide at tips (of "bell"). Segmental sutures distinct half way 

 cephalad from caudal margin. Lobes: 2 pairs, but slightly denser than 

 chitinized margin, not very conspicuous. Median, narrow, parallel, 



