Taiwanese Journal of Entomological Studies

12-16

Authors: WEI-ZHE TSENG, BIN-HONG HO

Cyrtotrachelus thompsoni Alonso-Zarazaga & Lyal, 1999 is a common species widely distributed in Asia, including China, Japan and Taiwan from East Asia; India and Pakistan from South Asia. In this study, we provided the first report of the pronotum phenotype difference of C. thompsoni between Matsu islands and Taiwan island. The photograph of habitus, illustration of male genitalia and key to Palearctic species of Cyrtotrachelus are also provided.

67-71

Authors: SO SHIMIZU

Two species of the genus Neurogenia Roman, 1910 (Hymenoptera: Ichneumonidae: Ctenopelmatinae: Perilissini), N. fujianensis He, 1985 and N. shennongjiaensis He, 1985, are recorded from Taiwan for the first time. A total of four Neurogenia species are recognized in Taiwan: N. cubitalis (Uchida, 1932), N. fujianensis, N. shennongjiaensis and N. tuberculata He, 1985.

53-59

Authors: AYAKA YAMAMOTO, TOSHINOBU MATSUMOTO, HIROTAKA KOBAYASHI, TAKESHI OSAWA, NAOKI KACHI, KATSUYUKI EGUCHI

An unnoticed establishment of Pheidole parva complex (Hymenoptera: Formicidae) to Chichi-jima Island of the Ogasawara Islands, which were nominated as a UNESCO Natural World Heritage Site, was recognized in 2007. Furthermore, P. megacephala, a famous invasive ant species, has also been highly prevalent in Chichi-jima Island in recent years. Since the majority of Pheidole spp. are generalist foragers, P. parva complex may has a potential risk to native ground-dwelling invertebrates in natural/seminatural forests of the Ogasawara Islands. Therefore, we conducted a survey of ants’ distribution as the basis for further foreseeable management. Current distribution and habitat preference of the two Pheidole species were surveyed in Chichi-jima, Ani-jima and Ototo-jima Islands of the Chichi-jima Island Group by Quadrat Sampling and Time-Unit sampling. Pheidole parva complex was widespread from the coastal area to the inland area in the three islands, and exhibited no clear habitat selection in the three islands. On the other hand, P. megacephala was absent in Ani-jima and Ototo-jima, but was frequently found in coastal lowland of Chichi-jima.

38-42

Authors: YUN HSIAO, BIN-HONG HO

Podabrus santaritensis Cockerell, 1936 is a fossil cantharid species described based on a single elytron preserved in the Paleocene Sunchal Formation from Quebrada, Jujuy, Argentina. The present study aims to discuss on the questionable familial and generic classification on the basis of the insufficient morphological information preserved in the holotype compression of this species. The case reveals the continuous future works on reexamination of the systematic placement of documented fossil Cantharidae is badly needed.