Academy of Sciences Proceedings Vol.13-15

Page 454

128 Utah Academy of Sciences, Arts and Letters Table 4-( Cont). Data indicating the effectiveness of Geocoris deco­ ratus m the control of Eutettix tenellus. Placed in Days [Vol. XIV, Cage Removed from cage Geocoris Living No. Dead E. tenellus in Eutettix Cage tenellus 7 7 7 7 7 7 7 7 8 8 8 4 4 4 4 4 4 4 4 II II II " II II II II 5 5 5 5 I 4 5 4 3 * I II II " II II II II II II II II II II II II 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 I E. tenellus I 10 females II I 10 females 110 females 39 I g II I S2 32 110 females II 58 I I 93 87 I g I 10 females 15* I 0 II I 10 females I 10 females 110 males I g females 0 0 'I I 110 females 110 females I 7 males I 0 I I females 10 females 110 I 0 I g I 37 41 69 57 66 47 79 89 74 85 70 5S 60 74 84 71 79 80 90 Living I Geocoris I I I I I I I I I I I I I I I I I I I I 5 7 7 o o 9 o 0. 2 3 o 10 4 10 5 o o o 10 8 4 o 10 10 o 0. o II I II II II II I II I 61 48 68 38 11 42 7 13 63 59 31 43 34 n 53 I 21 11 26 I II I II I II 15 30 45 40 26 16 29 21 20 10 Signifies 3 males and 2 females. unidentifiable fragments sand and small pebbles; 25 stomachs contained only was one empty. and entirely brown-shouldered utas collected 2. An examination of 298 stomachs of Bassia hyssopifolia, and other host A. argentea, near Atriplex rosen, among or Russian thistle) in this same area plants of the beet leafhopper (not including 12 Collembola in 3 stom­ insect material; contained the following recognizable 81 and 162 nymphal grasshoppers in achs; 174 Orthoptera including 7 adult in larval N 3 europtera and adult 3 camel cricket; stomachs, 3 crickets and 1 adult 201 including 5 stomachs; 15 Odonata in 14 stomachs; 734 Hemiptera ericae, 96 adult and 143 nymphal Geocoris, 110 adult and 4 nymphal Nysius 292 adult including 689 Homoptera 21 in stomachs; Miridae and 5 nymphal in 160 stomachs, 12 tenellus or beet leafhoppers and 21 nymphal leafhoppers, 9 aphids, 1 Coccidae, and Agallia besides 13 adult 1 2.8 Carabidae, Staphlynida, 23 larvae, 1 Cercopidae; 115 Coleoptera including 1 Elateridae, 3 Coccinellidae, and 1 Aphodt­ 7 Scarabaeidae, 28 Chrysome1idae, contain­ including 85 caterpillars, one stomach us distinctus, 109 Lepidoptera mus­ abundant upon are which commonly larvae 7 ing 19 Plutella maculipennis, 1 Stratiomyiidae, 76 Culicidae or mosquitoes, tards; 115 Diptera including and 341 nymphal Eutettix