caa a22 4500 38809351X CHVBK 20180307125258.0 cr unu---uuuuu 161130e199904 xx s 000 0 eng 10.4039/Ent131219-2 doi S0008347X00009834 pii (NATIONALLICENCE)cambridge-10.4039/Ent131219-2 Sousa João M. Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9 DEVELOPMENT OF TIPHODYTES GERRIPHAGUS (HYMENOPTERA: SCELIONIDAE) IN LIMNOPORUS DISSORTIS EGGS (HEMIPTERA: GERRIDAE) [Elektronische Daten] [João M. Sousa] Investigations of preimaginal development in Tiphodytes gerriphagus Marchal reveal two larval instars, based on counting exuviae and comparing mandible length during development within Limnoporus dissortis Drake & Harris eggs. Tiphodytes gerriphagus eggs are stalked, as is typical of scelionids, and are 282.6 ± 3.48 μm (mean ± SE) long. The chorion ruptures at 8-9 h postoviposition and releases a nonfeeding embryo into the host. Feeding begins at 18-20 h postoviposition, after the embryonic cuticle is shed and a fully differentiated and active larva is released. The first larval stage is teleaform and lasted up to 5 days postoviposition, and its total length increased from 183.6 ± 3.35 to 517.0 ± 14.67 μm. The second larval stage is hymenopteriform and lasted from 5 to 13 days postoviposition, and grew from 920.2 ± 24.65 to 1352.4 ± 11.89 μm total length before pupating. The pupal period lasted about 11 days, with male pupae being shorter and thinner than female pupae. These findings differ from previous descriptions of T. gerriphagus, and it is suspected that the first instar was mistakenly divided into two stadia. The sex ratio under laboratory conditions was female biased (22% males), and males were smaller but did not emerge significantly earlier than females. Copyright © Entomological Society of Canada 1999 The Canadian Entomologist Cambridge University Press 131/2(1999-04), 219-228 0008-347X 131:2<219 1999 131 TCE https://doi.org/10.4039/Ent131219-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent131219-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Sousa João M. Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 131/2(1999-04), 219-228 0008-347X 131:2<219 1999 131 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge