Bioacoustics of Alipes

Diagnosis. Median tooth of labrum well developed. Forcipular tooth-plates present, trochantero-prefemur with well-developed process ( Fig. 86 ). Tergites with some (usually five) longitudinal keels ( Fig. 87 ); well-developed spinules (not tubercles, as noted Edgecombe & Bonato 2011 ) of various sizes arranged along the keels (“spinulated keels”, see above). Space between tergal keels spinulated (not granulated, as noted Edgecombe & Bonato 2011 ). Sternites lacking both paramedian sutures and longitudinal sulci, sometimes with some (in most species three) shallow depressions. LBS 7 lacking spiracles, the latter with an atrium. Legs with tarsal spur(s). Coxopleural process very short, apically rounded and spineless ( Fig. 88 ). Ultimate legs considerably elongated, prefemur and femur normal, tibia and tarsi strongly flattened forming an oval leaf-shaped structure ( Fig. 85 ), with stridulatory grates on opposite surfaces of tibia and tarsus 1; pretarsus rudimentary or totally reduced. Ultimate prefemur ( Fig. 88 ) lacking both spines and corner spine; in A. appendiculatus Pocock, 1896 and A. calcipes Cook, 1897 prefemur with a median digitiform process attaching close to its base. This process is long in males (fig. 214 in Attems 1930 ) and rudimentary in females and is similar to that of Parotostigmus males.