Longicornia Malayana. 57 



Tlie antennae vary from two or three times the length of, to a 

 little shorter than the body, the terminal joint is frequently hooked 

 at the point, but the scape is always short, or comparatively so, 

 and ovate or slightly clavate, except in some species of Oncideres. 

 The prothorax is usually subtransverse, unarmed at the sides, 

 but having instead one or frequently two short tuberculiform teeth 

 near its anterior border. The elytra are oblong or ovate, with a 

 tendency to develope into crests or elevated lines at the base, or 

 to throw out little granules, which are almost invariably black 

 and glossy. The legs are of moderate length (except in many 

 cases the fore-legs of the males), and robust ; the thighs more or 

 less clavate, never linear. The tarsi are nearly all of equal lengtli, 

 more or less trigonate, with the claw-joint as long as the three 

 basal taken together. -The anterior coxae of the males are often 

 armed with a recurved spine, occasionally of a formidable length, 

 as in Ischioplites metuttis and X'lphotheata Saitndersii. The pro- 

 sternum is invariably elevated to a level with the coxee, except in 

 Oncideres, and this is often met by a corresponding elevation of 

 the mesosternum, so that the power of the insect in bending is 

 considerably reduced. The three intermediate abdominal segments 

 are the shortest ; in a few species, however, the second segment is 

 of greater length, and is then covered, more or less, with a semi- 

 circular patch of very densely set erect hairs. 



In this great sub-family Europe is represented by only a single 

 species {^Nlphona picticornis'). Oncideres, numerous in species, 

 and other genera, abound in South America. Africa yields Hecyra, 

 Dichostales, Diastocera, and a few other genera not containing 

 many species. In Australia we have numerous species of Si/m- 

 phyletes, Rhytiphora, Penthea, &c. From Asia we know of no 

 genus peculiar to it, and very few species. In the Wallacean 

 Collection we find eighteen genera and fifty-seven species. 



The characters that have been used in the following table are 

 mostly of a secondary nature, but they are the most obvious so 

 far as the species treated of here are concerned. 



Genera. 



Mesosternum produced, or often toothed anteriorly. 

 Antennary tubers distant (front flat or convex). 



Third antennary joint shorter than, or rarely as long as, the 

 fourth. 

 Tibiae of the intermediate and posterior 



legs shorter than their tarsi /Elara, Thorns. 



