Bioacoustics of Namtokocoris

Discussion . Males have the well-developed pad of hairs on the mesotibia (present but reduced in females), which is consistent with the subfamily Laccocorinae . However, both sexes have a single nonarticulated protarsal segment and single claw, which is inconsistent with established subfamily attributes. Intraspecific variation in aedeagal striations exists such that the striations might be apparent on both sides of the midline, or on only one side. Whether or not these striations have stridulatory function is unknown. The secondary longitudinal suture within the clavus was observed in all specimens examined, and appears to correspond with macroptery (H. Zettel, pers. comm.). All specimens examined for hindwing condition were macropterous. The subfamily Laccocorinae has been characterized by somatic dimorphism of the forelegs and middle legs. Specifically, the forelegs of laccocorine males have two-segmented, articulated tarsi; whereas females have one-segmented, articulated tarsi. This condition as a unifying feature of the subfamily is vitiated by the discovery of Namtokocoris . However, other features of the subfamily hold consistent, including that laccocorine males have the mesothoracic tibia with a well-developed dense pad of hairs widening distally, and that in females this pad of hairs is weakly developed. In addition, the parameres are small, the labrum is well developed, and the morphological apex of the head is folded down and oriented posteriorly. Based on the character states in common with other members of the subfamily, Namtokocoris appears to be most closely related to Diaphorocoris . Both genera have elevation and paired protuberances of the scutellum, and hair lines on the hemelytra (Table 1). These genera both have a dense midventral hair band in common with Ctenipocoris . Analysis including molecular data is needed to more effectively evaluate phylogenetic relationships. TABLE 1. Character comparison of Namtokocoris with other Asian genera of Laccocorinae .