184 A MANUAL OF DANGEROUS INSECTS. 



Premnotrypes solani Pierce. 

 (Peruvian Potato Weevil. Brachyrhinidse [Otiorhynchidse] ; Coleoptera.) 



Host: Potato. 



Injury: Bores in the tubers. Has been received alive in the United States in 

 potatoes from Peru. 



Description and biology: Adult weevil bronzy brown somewhat tuberculate with the 

 thorax narrower than the elytra ; beak moderately long. Length 7 mm. Pupa white 

 with rudiments of all appendages folded on the underside. Found in the potato. 

 Larva white, legless, with chitinized brownish yellow head. Bores in the tubers. 

 (See plate xxxvii, figs. 1, 2.) 



Distribution: Peru. 

 Pierce, W. Dwight. Journ. Agr. Research, vol. 1, No. 4, pp. 346, 349, text figs. 1, 2; 



pi. 41, figs. 1, 2. 



Trypopremnon latithorax Pierce. 



(Peruvian Potato Weevil. Brachyrhinidse [Otiorhynchidse] ; Coleoptera.) 



Host: Potato. 



Injury: Bores in the tubers. Has been received alive in the United States in 

 potatoes from Peru. 



Description and biology: Adult weevil brown, tuberculate, with a very broad pro- 

 thorax, scrobes abruptly terminated behind, mandibles with a tooth beneath. Length 

 6 mm. Pupa white with rudiments of all appendages folded on the underside. 

 Found in the potato. Larva white, legless, with chitinized brownish yellow head. 

 Bores in the tubers. (See plate xxxvir, fig. 3.) 



Distribution: Peru. 



Pierce, W. Dwight. Journ. Agr. Research, vol. 1, No. 4, pp. 349-350, text fig. 3; 



pi. 41, fig. 3. 



Hypera (Phytonomus) spp. 



(Potato Leaf Weevils. Curculionidse; Coleoptera.) 



Species: H. variabilis Herbst; breeds on the leaves of potato, clover, etc., and 

 attacks bean, cabbage, service berries, Plantago lanceolata, Atriplex patula. H. 

 crinita Boheman; Algeria and Tunis; breeds" on potato. 



Injury: These are potentially important pests. Judging from the ease with which 

 the clover pests of this genus have been imported it is important to guard against these 

 weevils. 



Description and biology: Similar in form to the well-known clover-leaf weevil, 



Hypera punctata. The larvae feed externally on the leaves and pupate in silken 



cocoons. 



B. OTHER IMPORTANT POTATO INSECTS. 



HEMIPTERA. 

 Miridae (Capsidae). 



Phytocoris pabulinus Linnaeus; Europe; sucks juices of stems. 



Jassidse. 



Eupteryx solani Curtis; Europe; injures leaf. 



COLEOPTERA. 



Bathyscia wollastoni 3 anson, the pigmy potato beetle; Europe, often a serious pest. 



Elateridse. 



Agriotes lineatus Linmcus. (See Tobacco.) 

 Lacon murinus Linnaeus; i£urope; wireworm. 



Meloidse. 



Zonabris floralis Pallas, Z. 14-punctata Pallas, Epicauta rufidorsum Goeze and E. sibirica Pallas, blister 

 beetles; Europe; very destructive. 



