78 Kansas Academy of Science. 



very few beetles of this species could be found by later examinations of 

 the sample of grains, the live ones outnumbered the dead. 



The book louse, Troctes divinatoria Fab. Active specimens considered 

 to be this species were occasionally seen in the powder and dust among 

 the grains. 



Eudiagogns rosenschoeldi Fah. One dead weevil representing this 

 native species was collected on a bag of rice, and two additional speci- 

 mens, also dead, were found among the grains. The insect was thought 

 to have been an adventitious introduction from the field, having prob- 

 ably been carried into the grain through the thresher at harvest time. 

 It is not regarded as a foe of rice in any manner. 



These statements give an idea of the conditions in which the pests 

 as mentioned specifically pass the winter in stored rice. Reference will 

 be made to these remarks in treating of hibernation. 



STATUS OF INFESTATION. 



In an effort to determine the status of infestation by the insects oc- 

 curring in the collected sample of rough Honduras rice, careful search 

 was made for specimens by sorting over the material and picking out 

 all visible live and dead stages of the pests that could be properly identi- 

 fied. The weight of the sample of rice came to exactly three pounds. 

 The results of the examination together with the outcome of a supple- 

 mentary one, are given in the following tables, the scores being ar- 

 ranged according to the relative importance of the species as was ascer- 

 tained by the number of stages representing each kind. While the mor- 

 tality of the stages ran very high, this phase must be regarded as an 

 accumulative result of infestation extending over a period of several 

 months. 



Results of first examination, made on March 15 and 16, 1912 : 



Name of species. Stage. No. alive. No. dead. Total No. 



Bhizopertha dominica Adxilt 90 885 975 



Latheticus oryzw Adult 5 50 55 



Sitotroga cerealella Adult 8 5 13 



Pupa Oil 



Calandra oryza Adult 12 12 



L(pmophl(i"us minvtus Adult 4 15 



Lophocateres pusUlus Adult 10 1 



Grand totals 108 954 1,062 



ADDITIONAL. 



Troctes divinatoria. Few specimens were found alive in du.st, but a reckoning of these 



was not deemed worth wliile. 

 Tenfbroides wauritanievs. Specimens taken at time of collection were not included in the 



count, since they had been picked from between and beneath the bags of the stock. 



Yet tiiey constituted a small percentage of the general infestation. Larva? found in 



second examina'tion, however, were sufficient for a proportionate calculation. 



Result of second examination, made on June 12, 1912: 



Name of species. Stage. No. alive. No. dead. Total No. 



Rhizopertha dominica Adult 17 694 711 



Lophocateres pvsilliis Adult 20 5 25 



Sitotroga cerealella Adult 19 19 



Larva 10 1 



Tribolivm navale Adult 10 10 



Latheticus oryzce Adult 4 3 7 



Larva 3 3 



Calandra oryza Adult 16 7 



Tenebroides mauritanicvs Larva 3 3 



Lcemophlceus minwlus Adult 112 



Grand totals 47 741 788 



Additional: Troctes divinatoria, numerous. 



I 



