Summary — The flagellar sensillar distribution in males of 12 species of bumble bees, including five species with large-eyed males, did not show any conspicuous species-specific or behavior-related pattern. The sensillar types were morphologically similar to those of other bee taxa. In contrast to Apis drones, the bumble bee antennae lacked ventral wall-pore sensilla.

No abstract

No abstract

The distal three of the seven flagellar segments of the scarabaeid beetle Phyllopertha horticola are lamelliform, gathered into a club, and possess five sensillar fields that are packed with sensilla placodea. The most proximal surface of the club bears only hair-shaped sensilla. On the inner four sensillar fields a narrow central elongated zone houses pit organs and cavities with sunken sensilla placodea and other sensilla. The most distal, fifth sensillar field is smooth. The sensilla placodea seem to be of several types. The only distinct difference between the sexes is the shorter and more rounded lamellae of the female. The total count of sensilla placodea in males outnumbers that of the females by about 60%.

Experientia 44 (1988), BirkhS.user Verlag, CH-4010 Basel/Switzerland 531 the manner of infection of Bufo tadpoles with N. carpoeapsae, it is probably similar to the results presented here, with death resulting from bacteria that entered the host's coelom through penetration holes made by the nematodes. These nematodes are not being used or recommended to control aquatic insects at this time; however, if they are so in the future, then their effect on young tadpoles should be taken into consideration. Summary. Both geranyl hexanoate and geranyl octanoate were identified by GC/MS as the major volatiles in a hitherto uncharacterized abdominal gland in females in Agriotes obscurus. Only geranyl octanoate was found in A. lineatus. In EAG tests performed on A. obscurus males, geranyl butanoate and geranyl hexanoate elicited the strongest antennal responses.