242 
BEI’ORT ON ECONOMIC ENTOMOLOGY 
Pest of rice 
The Saw-toothed C4 k a i n Beetle 
Siloanus SU7'hull liens is, I jinn. 
A box of dried figs, badly infested by this pest, was sent to the laboratories 
during lOOfi. 
The iiihdt is a slender flattened dark brown beetle, 2-25-3 iiini. in length, and can 
easily be recognised by the presence of tw^o shallow' longitudinal grooves on the dorsum 
of the thorax, and six saw'-like teeth on either side. 
It is recorded to attack edibles of almost every description, including grain. Hour, 
condiments and herbs. 
There are upw'ards of four broods in the year. 
The Cigarette Beetle 
Lasioderma serricorne 
Egyptian cigarettes containing this beetle w'ere received during 1907 from El Kaim. 
Jackson Bey. 
This pest attacks dried tobacco of all kinds and will also feed on cayenne pepper, 
ginger, rice, and many other substances. 
The adult is a chestnut-brown, humpbacked beetle, about 3 mm. in length. Antennae 
serrate. 
The damage done to cigars and cigarettes is very noticeable, owing to the halht this 
pest has of eating holes in the wrapper. 
There are upwards of six broods in the year. 
A Bean Weevil 
Th'uchus, sp. 
A sample of beaus received from Shendi was infested by one of tlie pseudo w'eevils, 
or Bnichi. All the members of this genus are seed eaters, but are not true weevils, though 
popularly known as such. 
Several species of Bnichi are known to attack beans and peas. 
The life-histories of these bean w'eevils differ from those of many of the store pests 
in that the beans are first attacked in the field, the adult female laying her eggs in 
the young developing beans. The larvai continue to feed within the beans until after the 
crop has been harvested, and in some oases the adults resulting from this brood w’ill 
deposit their eggs on dried beans in the granary. 
The species in question continued to breed in the beans, in which they had been 
received, for several months, until the seeds were absolutely riddled with holes. 
The adult is about 4 mm. in length, and comes very near linirdiiis nhtecfus, Say. 
Its life-cycle can be completed in forty days, and possibly in less. 
The E i c e Weevil 
flalandra ori/za, Linn. 
Dura containing this beetle was sent to the Laboratories during 1906. 
The adult is a dark browm, almost black w'eevil, with four dull reddish spots on the 
elytra. 
Length, about 4 mm. 
It attacks wheat, maize and other grains and grain products. 
There are upwards of four broods in the year. 
