IQOO] ENTOMOLOGICAL NEWS. 493 



cidata, nmricata, sabmiajia, coulteri and sylvestris. Pinus sylves- 

 tris is an European species and is attacked in Europe by three 

 species of Diplosis, viz, , D. Pint, brachyntera and signata. But 

 all of these pines are attacked but slightly compared with radi- 

 ata. As regards the geographical distribution of the pest, 

 it has been found abundantly at Stanford University, at Menlo 

 Park (a village only two miles away), and in small numbers at 

 a number of other places on the San Francisco peninsula and in 

 the Santa Clara valley. But its center of distribution is evi- 

 dently the extensive groves of Monterey Pine on the Stanford 

 ranch (University campus) and neighboring extensive grounds 

 of the residents of Menlo Park. 



In the Golden Gate Park at San Francisco apparently the 

 same species of Diplosis was found in February and March, 

 1897. Many specimens of eggs, larvae, pupae and adults were 

 obtained and examined but, strangely, there was no shorten- 

 ing or swelling of the needles of the attacked fascicles, although 

 the needles turned yellow\ The larvae were situated always 

 near the base of the needles. The characteristic deformation 

 of the needles on the affected trees at Stanford was always 

 present whatever the species of pine. But here in Golden Gate 

 Park, 35 miles distant from Stanford, the Monterey Pines, 

 although attacked by apparently the same pest, do not show 

 the deformation. [One of Mr. Snow's notes touching the 

 identity of the flies from the two places is : " March 2 ; 

 Golden Gate Park flies issuing in laboratory ; they look for 

 all the world like our Diplosis here. Don't understand this.] 



There are several species of Diplosis which attack the 

 needles of various species of pine in this country and Europe. 

 These are Diplosis brachyntera, D. signata and D. pini on the 

 European Pinus sylvestris; D. pini-i7iopis on the Jersey or scrub 

 pine, Pinus inopis ; D. brachynteroides, also on P. inopis, and 

 D. pini-rigida on the American pitch pine, P. rigida. 



Diplosis pini differs from our Monterey Pine species in that 

 the larva bears upon its back two rows of setiferous fleshy proc- 

 esses or caruncles. They do not cause gall-like swellings at the 

 bases of the needles. The joints of the male antennae are 

 double and the ovipositor of the female is short. This Euro- 



