190 Journal New York Entomological Society. [Voi. v. 



Professor CockereU's paper on Mexican Coccidae, in 1893 (Ann. 

 & Mag. Nat. Hist. Ser. 6, Vol. XII, pp. 47-53), l^rought the list of 

 species and varieties then known up to 30, his paper having added 12 

 species. The early additions to the list are shown in the following 

 table adapted from Cockerell : 



Species known from Mexico before Signoret's time, ... 3 



" added by Signoret (1873-75), 2 



<' " Comstock (1882-83), 3 



'' " Riley and Howard (1890) 2 



" found by Duges (up to 1893) 8 



Total up to 1893, 18 



In 1893, Cockerell found, on a trip through Mexico, 12 additional 

 species, bringing the list up to 30. Since then the number has been in- 

 creased by the writer, who found 19 additional species in 1894; 8 

 further additional in 1895; and 16 still further additional in 1896. In ad- 

 dition to these, Mr. Alexander Craw has found, up to 1897, in the course 

 of his horticultural quarantine work at San Francisco, 7 more species, 

 thus bringing the total up to 80 in all with the close of the year 1896. 

 Therefore, in three years (1894, 1895 and 1896) the list of Mexican 

 Coccidse has been increased 50 species, and that during only a few 

 weeks each year, probably not exceeding three months altogether, dur- 

 ing v/hich time much other work was also attended to. This indicates 

 the surprising results to be obtained in collecting and investigating 

 scale-insects in Mexico, Central America, and the West Indies, as well 

 as South America, which is still less known in this respect. The writer 

 is at present engaged in collecting further material in Mexico, and has 

 a considerable number of species already which are doubtless additional 

 to this list, but it will be some time before they can be worked up. 



NEW SAWFLIES (TENTHREDININiE) WITH DE- 

 SCRIPTIONS OF LARViE. 



Bv Harrison G. Dyar, Ph.D. 



Siobia excavata Norto7i. 1, 



Antennae short and thick, a little thickened before apex ; posterior 

 tibiae not reaching apex of abdomen ; eyes reaching almost to base of 

 mandibles ; labrum round, pointed ; lanceolate cell with oblique cross 



