CHALCIDIDS INJUKIOUS TO FOEEST-TKEE SEEDS. 159 



SO far as forest trees are concerned, no more details concerning it need 

 be given, but any one wishing to obtain information regarding this 

 insect may consult the above-mentioned paper by Crosby. 



BIBLIOGRAPHY. 



Ichneumon nigricornis Berger, 1803, p. 141. 



Torymus druparum Boheman, 1833, p. 361. 9 $ 



Syntomaspis pubescens (Foerster) Mayr, 1874, p. 103. (There is some doubt as to this 



being the same.) 

 Mokrezecki, 1906, pp. 390-392, figs. 1-2. 

 Syntomaspis druparum (Boheman) Gu^rin-M^neville, 1865, pp. 83-85. 



Thomson, 1875, p. 76. 



Horvath, 1886, p. 127. 



Schlechtendal, 1888, p. 416. 



Dalla Torre, 1898, p. 294. 



Rodzianko, 1908. 



Crosby, 1909, pp. 369-375, figs. 67-76. 



MEGASTIGMTJS SP. 



A species of Megastigmus is recorded by Kiley through rearings 

 conducted by Borries, from the Japanese Abies mariesii. Nothing 

 more is known about this species. 



BIBLIOGRAPHY. 



Megastigmus D. Riley, 1893, p. 360. 



MEGASTIGMUS BBEVICAUDIS Ratzeburg. 



This insect is considered by its original describer as probably a 

 parasite of a gall fly inhabiting the fruit of mountain ash {Sorlus 

 scandica), but Crosby has proven the species as entirely phytophagous 

 in habit, and has reared it from seeds of Sorbus aucuparia. Crosby 

 describes the larva as white, smaller than the larva of Syntomaspis 

 druparum, from which it may be distinguished by the mandibles 

 having four teeth on their inner margin and by the absence of brown 

 tubercules on the face. The oviposition habit and the egg of this 

 species are unknown, but it may be presumed that they are similar 

 to those of the foregoing species. 



BIBLIOGRAPHY. 



Megastigmus brevicaudis Ratzeburg, 1852, p. 225. 

 Dalla Torre, 1898, p. 286. 

 Crosby, 1909, pp. 375-377, figs. 78-79. 



MEGASTIGMUS STROBILOBIUS Ratzburg. 



The original describer of this insect considered it to be parasitic 

 on Tortrix strohilotina, but since then it has been shown by Judeich 

 and Nitsche that this species lives, as do other species of Megastigmus, 

 within the seeds of plants, this species choosing the amabilis fir {Abies 



