471 



H. secalis, Fitch, attacking rye and forming galls about the second 

 or third internodes from the base ; H. Jiordei, Harris, forming galls 

 above the second to fourth internodes in barley ; H. albomaculata, 

 Ashm., breeding in the centre of the stems of timothy grass {Phleum 

 pmtense) ; H. captiva, How., forming galls near the base of the seed 

 stalk, and H. poae, sp. n., living in the centre of the stem of blue grass 

 {Poa pmtensis) ; H. dactylicola, sp. n., inhabiting the stem of cock's-foot 

 grass {Dactylis glomerata). 



The following species were reared from Elymus : H. elymi, French, 

 which inhabits the stems and breeds in the spurs, and H. rufipes, sp. n., 

 H. hesperus, sp. n., H. ovata, sp. n., H. elymoxena, sp. n., H. elymicola, 

 sp. n., H. elymophila, sp. n., H. elymivora, sp. n., and H. elymophthora, 

 sp. n., all of which are gall formers. H. maculuta, How., breeds in the 

 stem of cheat {Bromus secalinus) and other species of Bromus. Species 

 reared from Agropyron are : H. agropyrophila, sp. n., which inhabits the 

 stems ; H. agropyrocola, sp. n., which lives in the stems and forms galls ; 

 H. atlantica, sp. n., which forms galls, sometimes occurring in the sheath 

 surrounding the head ; H. occidentalis, sp. n., which forms galls near 

 the head of the plant and inhabits the stem. H.festucae, sp. n., forms 

 galls in the second to fourth internode from the base of Festuca ; and 

 H. poophila, sp. n., has been reared from galls on Poa lucida. 



Gillette (C. P.). Eighth and Ninth Annual Reports of the State 

 Entomologist of Colorado for the Years 1916 and 1917. — Office 

 of the State Entomologist, Fort Collins, Circ. nos 21 and 26, June 

 1917 and May 1918, 31 and 52 pp. [Received 3rd September 

 1919.] 



These reports include those of various county horticultural inspections 

 and record the following pests : Aspidiotus perniciosus (San Jose 

 scale), which is becoming less abundant ; A. ancylus (Putnam scale), 

 which has appeared in certain districts on cherries ; A. howardi, which 

 is fairly common on pears, though the damage caused is not very great ; 

 Cydia (Oarpocapsa) pomonella (codling moth), which is still one of 

 the most serious pests in orchards ; and lortrix (Archips) argyrospila 

 (fruit-tree leaf-roller), which has proved very troublesome. Experi- 

 ments show that spraying with insecticides is not to be depended on 

 for killing the eggs of this moth. The most efEectual treatment was 

 the use of hot water at a temperature of 140°F. applied for about 

 10 seconds. 



Eriophyes pyri (pear-leaf blister-mite) has shown a preference for 

 apples in certain locaUties, the fruit being either blemished or reduced in 

 size owing to leaf injury. The adults hibernate under and about the 

 bud scales. It can be easily controlled by using lime-sulphur as a 

 dormant spray each second or third year. Gossyparia spuria (ehn scale) 

 is still spreading, but its ravages may be checked by the use of soluble 

 oil as a dormant spray ; a strong stream of water has also been efEectual 

 on low trees. Prionoxystus robiniae (black locust borer) is gradually 

 destroying aU the black locust trees {Robinia pseudacacia). Pulvinaria 

 innumerabilis (cottony maple scale) is best controlled by spraying 

 with 15 to 18 per cent, kerosene emulsion before the buds open in the 

 spring. Experiments made with nicotine sulphate show that all nymphs 



