01689nas a2200145   4500008004100000245008200041210006900123300001200192490000700204520123400211100001601445700001501461700002001476856004701496       2003                        eng d00aGender differences in lifespan and mortality rates in two seed beetle species0 aGender differences in lifespan and mortality rates in two seed b  a619-6260 v173 a1. In most animals, females live longer than males, and large individuals live longer than small individuals. We examine both gender and body size effects on adult lifespan in two species of seed beetles (Callosobruchus maculatus and Stator limbatus), and test whether body size differences between males and females can explain gender-differences in mortality rates and lifespan. 2. In both species, the effect of age on mortality rate was best described by a logistic mortality curve. C. maculatus females have a higher initial mortality rate than males, while males have a much higher rate of increase of the mortality rate with increasing age. In contrast, S. limbatus males had a higher initial mortality rate ( opposite to the pattern seen in C. maculatus) but males and females did not differ in the rate of increase of mortality with increasing age. 3. Body size was positively correlated with lifespan in both species, but it explained very little of the variance in lifespan (R-2<0.09 for both species) and did not explain the gender difference. 4. Lifespan was heritable for both genders of both populations (h(2) between 0.19 and 0.55), and the shape of the mortality curves varied among families within both species.1 aFox, C., W.1 aDublin, L.1 aPollitt, S., J.  uhttps://cephaloleia.myspecies.info/node/3001738nas a2200133   4500008004100000245021500041210006900256300000900325490000800334520117800342100001801520700001901538856004701557       2003                        eng d00aThe Neotropical species Askalaphium depressum (Bates): Larval description, first diagnosis and illustrations of immature Ctenodactylini, with natural history notes on the genus and tribe (Coleoptera: Carabidae)0 aNeotropical species Askalaphium depressum Bates Larval descripti  a1-150 v2733 aAdults and larvae of Askalaphium depressum (Bates) live in association with hispine chrysomelid beetles of the genus Cephaloleia Chevrolat, in the appressed leaf axils of the riverside reed, Gynerium sagittatum (Aubl.) P. Beauv. This reed is locally known in Amazonian Perú as Caña Brava. Both adult and larval A. depressum eat larvae of Cephaloleia species and larvae of an unidentified dipteran, and perhaps other insects living in the confines of the leaf sheaths of that plant species. The geographic range of Caña Brava reed extends from subtropical South America northward to México (and Florida), but A. depressum has been found thus far at only three Amazonian localities, probably indicating its cryptic microhabitat and lack of collecting, therein. Likely, the range of this commensal carabid species is more extensive and may approach the range of its host plant and hispine food. Structural features of second and third instar larvae of A. depressum are described for the first time. Larval character states that are shared with a related ctenodactyline, Leptotrachelus dorsalis (Fabricius), provide a basis for characterization of the tribe Ctenodactylini.1 aErwin, T., L.1 aMedina, R., F.  uhttps://cephaloleia.myspecies.info/node/31