roofed with thatched material. Often these houses only consist of one single room where the meals are prepared on open fire so that the smoke can cause infections of the eyes. The roofs bear a deadly danger which comes overnight: the blood-sucking winchuka bugs (vinchuca), common to the zone, which can cause the Chagas disease. During the day the insects hide in crevices in the walls and roofs made of straw. The bugs emerge at night, when the inhabitants are sleeping. One measure to reduce the risk of acquiring the disease is the renovation of houses by using tiles and the construction of houses that are resistant to the entry of the bug. Some data: The latest results about the ethnic-linguistic composition of the population are as follows: Ref.: obd.descentralizacion.gov.bo Languages The languages spoken in the Arque Province are mainly Quechua and Spanish. The following table shows the number of those belonging to the recognized group of speakers. References Provinces of Cochabamba Department