Trissolcus edessae Fouts, 1920

Talamas, Elijah J., Johnson, Norman F. & Buffington, Matthew, 2015, Key to Nearctic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), natural enemies of native and invasive stink bugs (Hemiptera, Pentatomidae), Journal of Hymenoptera Research 43, pp. 45-110 : 67

Trissolcus edessae Fouts

Figures 56-59

Trissolcus edessae Fouts, 1920: 65 (original description); Masner and Muesebeck 1968: 72 (type information); Johnson 1984: 799, 801 (description, keyed); Johnson 1987: 289, 300 (diagnosis, keyed).

Diagnosis.

Trissolcus edessae may be distinguished from the native species of Nearctic Trissolcus in the Trissolcus flavipes group ( T. brochymenae , T. euschisti , and T. strabus ) by the abruptly bicolored female antennae. It may be separated from T. japonicus by the presence of 2 clypeal setae and the episternal foveae that do not form a continuous line from the postacetabular sulcus to the mesopleural pit. It may be separated from T. cultratus by the absence of parallel arched rugae on the frons. In T. edessae a median mesoscutal carina is often present, and this is absent in T. cultratus and T. japonicus .

Johnson (1984) used the absence of a mesopleural carina in T. edessae as a diagnostic character. Our examination included a specimen in which the mesopleural carina is present (Fig. 58 ) and thus we prefer not to use this character for identification. A result of this is that unambiguous identification of male specimens may require movement or removal of the wings to properly evaluate the surface sculpture within the axillar crescent.

Link to distribution map.

[http://hol.osu.edu/map-large.html?id=3221]

Associations.

Emerged from egg of Acrosternum hilare (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Edessa bifida (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; parasite of Edessa bifida (Say): [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from egg of Euschistus Dallas: [ Hemiptera : Heteroptera : Pentatomoidea : Pentatomidae ]; emerged from Pachycoris torridus (Scopoli): [ Hemiptera : Heteroptera : Pentatomoidea : Scutelleridae ]

Material examined.

Holotype, female: UNITED STATES: LA, Orleans Parish, New Orleans, 23.VII.1919, C. E. Smith, USNMENT00872412 (deposited in USNM). Other material: (2 females, 1 male, 29 sex unrecorded) EL SALVADOR: 3 sex unrecorded, USNMENT00764980, USNMENT00764981, USNMENT00764993 (USNM). NICARAGUA: 2 sex unrecorded, OSUC 398762-398763 (CNCI). UNITED STATES: 2 females, 1 male, 24 sex unrecorded, OSUC 17814 (BMNH); OSUC 398760-398761 (CNCI); OSUC 523872 (MEMU); OSUC 145559, 542444, 75617-75636 (OSUC); OSUC 145649 (USNM).

Figures

Figures 56 - 59. 35 Trissolcus edessae 56 female holotype (USNMENT 00872412) head, mesosoma, metasoma, lateral view 57 female holotype (USNMENT 00872412) head, mesosoma, dorsal view 58 (USNMENT 00764981), mesopleuron, metapleuron, lateral view 59 female holotype (USNMENT 00872412), head, anterior view. Scale bars in millimeters.