Bioacoustics of Heilipus rufipes

Remarks. Heilipus gibbus sp. nov. is very similar to H. catagraphus in appearance. Both share a similar pattern of coloration ( Figs. 1, 2, 7 ─10 and 35, 36, 41, 42) and may be confused. Heilipus gibbus has been misidentified in collections and literature as H. catagraphus , most likely due to color resemblance. However, the two species can be easily distinguished by the following characteristics (characters of H. catagraphus given parenthetically). Base of rostrum strongly gibbous ( Figs. 4 , 12 ) (dorsum of rostrum regularly curved from apex to base, not gibbous) ( Figs. 38 , 44 ); it is noteworthy that a humped rostrum is not mentioned in the original description of H. catagraphus and in any other original description of the Heilipus species which occurs in Brazil . Tooth of profemur with inner edge rounded ( Figs. 5 , 13 ) (inner edge straight, Figs. 39 , 45 ). Basal 2/3 of pronotal disk concave ( Figs. 1, 7 , 9 ) (2/3 of pronotal disk flattened, Figs. 35 , 41 ). Heilipus rufipes ( Figs. 56, 57 , 62, 63 ) is easily distinguished from H. catagraphus ( Figs. 35, 36 , 41, 42 ) and H. gibbus ( Figs. 1, 2, 7,8 , 9, 10 ) by the elytral color pattern, formed by an irregular and interrupted band of white scales on each elytral side and isolated patches of similar scales on disc. Other striking differences are the pronotum with rounded tubercles ( Figs. 56 , 62 ), the legs evenly dark reddish-brown ( Figs. 56, 57 , 62, 63 ), the sternite VIII Y-shaped, with a long strut ( Fig.76 ), and different spermatheca with unciform apex ( Fig. 75 ). The stridulatory apparatus in H. gibbus sp. nov. is very similar to that described for H. odoratus Vani n & Gaiger (2005) by Nunes et al. 2009 .