20 INDKX TO MISSOURI ENTOMOLOGICAL REPORTS. 



Page. 



Snout-beetles Continued. 

 TIIE COMMON PLUM CURCULIO 11 



It is single-brooded, 11 Experiments to prove this fact, 12 It hiber- 

 nates as beetle, 13 Form of the egg, 13 Feeding habits of the beetle, 



13 Creaking noise produced by it, 14 Stridulation in other insects, 14 

 It is nocturnal rather than diurnal, 14 Habits of the beetle at night, 



14 Remedies, 15 The Ransom Chip-trap process, 15 ; explanation of 

 the process, 15 ; it is not so successful as anticipated, 15 ; it is not a new 

 discovery, 16 ; number of Curculios caught by it, 16 ; its success depend- 

 ent on the character of the soil, 17 ; directions for using the process, 17 ; 

 more experiments needed, 17 Offering premiums for collecting speci- 

 mens, 17 Absurdity of the application of Paris Green for the Curculio, 

 18 Jarring by machinery, 18 The Hull Curculio-catcher defective in 

 several respects, 18 The Ward Curculio-catcher, 20 ; how it could be 

 improved, 20; rules for using the machine, 21 Curculio-catcher in- 

 vented by Claxton &. Stevens, 22 Hooten's Curculio-catcher, 22; its 

 advantages and mode of operation, 24 Two true parasites of the Plum 

 Curculio, 24 The Sigalphus Curculio parasite, 24; Fitch's account of 

 it, 25 ; "Walsh's doubt about its being parasitic on the Curculio, 25 ; ex- 

 periments and observations proving that it is a parasite of the Curculio, 

 25; its development and frequent occurrence around St. Louis, 25; it 

 attacks also other soft-bodied larvae, 26 ; points in its natural history, 

 26 ; its position in the system, 27 ; description of the imago, larva, pupa, 

 cocoon and of the var. rufiis, 27 The Porizon Curculio parasite, 28 ; how 

 it differs from the foregoing, 28; description of the imago, 28 Import- 

 ance of the work of these parasites of the Curculio, 29 Artificial prop- 

 agation and distribution of parasites, 29. 



THE APPLE CURCULIO 29 



How it differs from the Plum Curculio, 30 Its natural history, 30 Food- 

 plants, 30 The punctures it drills into the fruit, 31 The egg, 31 The 

 larva and its habits, 31 The larva transforms within the fruit, 32 

 Amount of damage it does, 33 How its work in the fruit can be dis- 

 tinguished from that of other insects, 33 It is very injurious in South- 

 ern Illinois and parts of Missouri, 33 It is less injurious to apples than 

 the Plum Curculio, 33 Injury done by it to pears, 33 The rot in apples 

 principally produced by it and by the Plum Curculio, 34 Season of its 

 appearance, 34 Remedies and preventive measures, 34 Description 

 of larva and pupa, 35. 



THE QUINCE CURCULIO 35 



Its food-plants, 35 It is very injurious to the quince in the East, 36 Dr. 

 Trimble's account of the damage done by it, 36 How the beetle differs 

 from the two preceding Curculios, 36 Its transformations and habits, 



37 Its puncture on the fruit, 37 It hibernates in the larva state, 37 - 

 Its larva mistaken by Dr. Fitch for that of the Plum Curculio, 38 The 

 imago state lasts only two months, 38 It does not attack the Apple, 



38 Remedies, 33 Description of the larva and pupa, 39. 



THE PLUM-GOUGER 3'J 



How it differs from the preceding species, 39 Injury caused by it, 39 

 Food-plants, 40 It is often mistaken for the Plum Curculio, 40 Sea- 

 son of its appearance, 40 Holes bored by it in the fruit, 41 The larva 

 lives within the kernel of the fruit, 41 Remedies, 41. 



THE STRAWBERRY CROWN-BORER 42 



Distribution of the insect, 42 Injury done by it, 42 Habits and charac- 

 ters of the larva, 43 Habits of the beetle, 43 Remedies, 43 Para- 

 site, 44 How the larva differs from that of the Grape-vine Colaspis, 

 44 Description of the imago and larva, 44. 



