160 MISCELLANEOUS FOREST INSECTS. 



amabilis). They also state that this species is distinct from Megas- 

 tigmus spertnotroj^hus, and that the larva is about 4 millimeters long, 

 whitish in color, and that the mandibles have three inner teeth. 

 Crosby records this species in Ahies pectmata. Riley records it from 

 Hooker hemlock (Tsuga mertensiana Itoolceriana) and from Ahies 

 excelsa. 



BIBLIOGRAPHY. 



Megastigmxis strohilohius Ratzeburg, 1848, p. 182. 



Judeich and Nitsche, 1893, p. 704; 1895, p. 1339. 

 Riley, 1893, p. 260. 

 Crosby, 1909, p. 368. 

 Megastigmus pictus (Foerster) Mayr, 1874, p. 138. 



Cameron, 1879, p. 138. 



Dalla Torre (in part), 1898, p. 287. 



MEGASTIGMTJS PINTJS Parfitt. 



This species was considered by its original describer to be a parasite 

 on some species of Cynips which infested the seeds of the bristle-cone 

 fir (Ahies venusta) (according to the original describer this was con- 

 sidered as Picea hracteata), of a new species of Tsuga, and of the 

 noble fir {Ahies nohilis). In the original account "etc." is added 

 after the foregoing list, which implies that other coniferous seeds are 

 attacked by this insect. Riley, in referring to material reared by 

 Mr. Borries, of Copenhagen, Denmark, adds that this species has been 

 reared from the seeds of Shasta fir {Abies magnifica) , from the white 

 fir {Ahies concolor), from the grand fir {Ahies grandis), and from the 

 amabilis fir {Ahies amabilis), but as Riley allows great variation 

 withm this species it may be that some of these rearings actually 

 contained some of the other species of Megastigmus. Other than the 

 above mentioned list of food plants nothing is published concerning 

 the biology of this species. 



BIBLIOGRAPHY. 



Megastigmus pinus Parfitt, 1857, pp. 5543, 5629, 5721. 

 Dalla Torre, 1898, p. 287. 

 Riley, 1893, p. 360. 

 Crosby, 1909, p. 368. 



MEGASTIGMUS SPERMOTROPHUS Wachtl. 



This insect was originally described in 1893 by Wachtl, and at that 

 time Wachtl stated with assurance that this species of Megastigmus 

 was phytophagous and lived within the seeds of the Douglas fir 

 {Pseudotsuga taxifolia). Smce then two papers have treated this 

 insect m some detail. The first of these was by MacDougall in 1906. 

 MacDougall knew the larva and felt reasonably sure that this species 

 was phytophagous. Some of his statements as to emergence are not 

 without interest ; he states that from a lot of seeds harvested in Octo- 

 ber, 1904, he found larvae m May. June, July, August, September, Octo- 



