Trigonops, Guérin-Méneville

Zimmerman, Elwood C., 1942, Curculionidae of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 73-146 : 81

TODO TODO TODO 1841

The genus Trigonops is the only representative of the Otiorhynchinae known to inhabit Guam. It is an Indo-Australian genus abundantly represented in the islands to the south of Guam-New Guinea, the Solomons, Java, and others. A number of new species from the Caroline and Palau Islands in the collections before me await description. It seems unusual to me that the allied genus Sphaeropterus has not populated Guam, for I have before me a number of species from the Caroline and Palau Islands.

Heretofore, there have been three species of Trigonops (describea. as Celeuthetes ) reported from Guam, but one of these species is not a Guam insect. To the two known species, I add six new ones to make a total of eight species now known from Guam. My reasons for concluding that one of the species was recorded from Guam in error are as follows: Boheman, in Schoenherr's Gen. Spec. Cure. 7(1):251, 1843, described Celeuthetes insularis from "Insula Guaham." The male holotype, however, bears the labels "Fidje Ins." and "Thorey." It is therefore evident that the locality in the type description is a misquotation. Moreover, the holotype is identical with the male of Trigonops spongicollis (Fairmaire) which is widely distributed in the south Pacific through the Fijian, Tongan, Samoan, Cook, Society, Austral, and other islands of that region and which was originally described from Tahiti. The confusion does not end here, however. A typical male specimen taken by me from a colony of Trigonops spongicollis (Fairmaire) was sent to the National Museum at Paris for comparison with the type. Dr. Lesne pronounced it the same as Trigonops grisea (Fainnaire) . I have dissected specimens taken from the same plant and have found that Trigonops spongicollis is a quite sexually dimorphic species and that Trigonops grisea is only the male of Trigonops spongicollis . The following synonymy is, therefore, necessary: