GRASSHOPPERS AND OTHER INJURIOUS INSECTS OP 1911 AND 1912. 



35 



Predaceous. 



Invertebrates. Insect: Various robber flies, (Asilidse) not- 

 ably Promachus vertehvatus, Erax aestuans, Sticliopogon trifas- 

 ciafa, Proctocanthus milbertii and others. ^>^ 



Predaceous beetles as follows : Pasimachus elonga- 

 tus, Ptersosiiclius lucuhlandus, P. sayi, Calosoma cali- 

 dum, C. frigidum, feeding upon adults and eggs ; Cara- 

 bus sylvestris and C. sylvanus, Ciclndella vidgaris, C. 

 'purpui-eaus, C. aiiduhoni and Amara sp. 



The Meloid, Macrobasis unicolor. 



Amongst the beetles it is quite possible that Elat- 

 erids and Staphylmids feed upon the eggs. 



Hymenoptera : Sphex ichneumonius, S. peymsyl- \ 

 vanicHS, CJilorion cyaneum, Pompilius americanus, P.Fig. 20. cri/oso- 

 atrox, Ammophila mtercepta, Bembex fasciata, Lam- Kirby. 

 pronota sp., and various ants, the latter attacking only small 

 nymphs. 



// V/'^'^M-, ^ 



fe-- ^^^' '^^^'^^^^^^^^"^^ 



Fig. 21. Tiger Beetle, all stages. After Brehni. 



Orthoptera : The striped Ground Cricket, Nemobiiis fasciatus, 

 feeds upon eggs. 



Arachnida: Trombidium sp. Undoubtedly many small grass- 

 hoppers fall a prey to spiders also. 



EXPLANATION OP PLATE II. 

 1. Arphia {tenebrosa) i^seudoniefana: 2. The Carolina Locust, Dissos/eira Carolina; 

 3. Dissosteira Carolina, young st&ge; 4. Z'tssos<e('raca/-o//«o. showing color variation ; 5. The 

 Two-striped Locust, Melanoplus bivittatus; 6 and 7. Melannplus bii-iUatus, immature forms; 

 8. The Red-legged Locust, Melanoplus femur-rubrum. 



