30 N. H. AGRI. EXPERIMENT STATION [Bulletin 247 



Eupelmus piiii TaA'lor, a primaiy parasite, has not been found 

 in New Hampshire. 



ICHNEUMONOIDEA 



A total of 10 male and 20 female Microbracon pini Mues. 

 emerged from May 27 to June 14, 1927. Only one female emerged 

 from Concord material. On the basis of numbers this parasite ap- 

 pears to be important in Durham and not in Concord. 



One female Hemiteles hydrophilus Ash. emerged May 29, 1928, 

 from Concord material. 



One male and one female Coeloides pissodis Ash. emerged June 

 18 and July 2 from Durham leaders. 



On September 3, 1926, two specimens of Calliephialtes comstockii 

 Cress, were collected at W. Swanzey, N. H. This insect has been 

 reported as a parasite of Petrova comstockiana Fernald, the larva 

 of which burrows in the twigs of certain conifers, not including 

 white pine. 



Among the braconid parasites mentioned in the literature are 

 Habrobraconidea bicoloripes Vier. ; Microbracon vanus Prov.; Bra- 

 con pissodes Ashm.; Spathius brachyrus Ashm.; and Doryctes sp. 



CYNIPIDAE 



The cynipid, Eacoila sp. wa.s fairly abundant in Durham mater- 

 ial. Emergence takes place the first half of July. Barnes (1928) 

 says it is a secondar}- parasite on Lonchcsa. 



SUMMARY 



The white pine wee\-il is the most important pest of white pine in New 

 Hampshire. 



It attacks dominant trees of large tip diameter in preference to reces- 

 sive trees of small tip diameter. 



Some other species of conifers are occasionally attacked. 



The weevil appears the latter part of April or the first of May and be- 

 gins ovipositing. 



Mating takes place in the spring. The female does not have to cop- 

 ulate throughout the season in order to jjroduce fertile eggs. 



The female may lay from 25 to 201 eggs in one season. The average 

 in these observations was 129. 



The ovipositing period terminates near the middle of July. 



At the end of oviposition the weevils move to other parts of the tree, 

 especially to the tips of the lateral branches in the vicinity of new growth. 



Some weevils do not die the first year but hibernate and appear a sec- 

 ond season. 



The weevils have a marked tendency to remain on a single host tree. 



Dispersion is believed to take place in the spring. 



The egg stage varies from 5 to 20 days, the average in these experi- 



