594 ENTOMOLOGICAL NEWS. [November, 



San Jose oi Diaspis pyricola, styled the "Italian pear scale," 

 which proves from specimens on French prune sent at our 

 request by Mr. E. M. Ehrhorn, January 24, 1900, and ex- 

 hibited herewith, to be the species under discussion. 



WTien in California last Fall (1899) Dr. Howard noted infes- 

 tation by what proves to be this scale insect on a pear tree in 

 the city of San Jose. Writing under date of January 24, 1900, 

 Mr. Ehrhorn says this scale insect has been in San Jose since 

 1889, and is spreading a little though being vigorously fought. 

 He says it has a habit of getting under moss on the trees, which 

 makes it more difficult to control. 



This Diaspis is still another illustration of a mischievous scale 

 insect which has come to us from Europe on imported stock. 

 The published records show it to occur very commonly on pear 

 in Germany, France, Italy and Portugal ; and in Italy also on 

 " apple, peach, etc." In the Department collection, it is rep- 

 resented from Germany and France on pear, and from Italy on 



apple. 



. » 



A New Eriococcus, With Remarks on Other Species. 



By T. D. A. CoCKERELL, N. M. Agr. Exp. Sta. 



Eriococcns qnercns tomneyi, subsp. nov. 



$. — Sac cjuite ordinary, closely felted, white, about 4 mm. long. Eggs 

 pale green ; the insect hibernates in the egg stage. 9 • On boiling in 

 liquor potassae, turns the liquid pale pink. Antenna? 7-jointed, joints 

 measuring in micomillimeters : (i.) ? (2.) 33, (3.) 51, (4.) 36, (5.) 24, (6.) 

 18, (7.) 30. Formula 342756 agreeing with that of E. guercus and dubius. 

 Femur with trochanter 228, tibia 150, tarsus 120, claw, 33, width of femur 

 69 u. Dermal spines very large, the largest 65 u long. 



Hab. — On twigs of Prosopis vclutina, close to the University 

 of Tucson, Arizona, collected by Prof. Tourney and the present 

 writer, Nov. 1899. It is quite scarce, being greatly reduced 

 by a dipterous parasite, doubtless Leucopis. 



The North American .species of Ericoccus (if we include an 

 inipublishcd one found by Mr. Parrott on grass in Kansas) are 

 14 in numlx-r, two of them {^aravcaruc and cocci ncus) being in- 

 troductions from abroad. Of these E. negledus is known by 

 its waxy .sac ; E. arenosus by its sandy sac, although individu- 



