DYNASTIN/E 179 



ri Mandibles entire and rounded externally; pronotum without im- 

 pression in either sex; pygidium arcuate at base in both sexes, very 

 large and convex (cf), much shorter, broader and transversely 

 tumid at the middle (9). [Type A. dunnianus Riv.] (Aphonides 

 Riv.) Anoplognatho 



Mandibles variably tridentate externally; pronotum with a rather large 

 anterior impression in both sexes; pygidium (c? 1 ) transverse, moder- 

 ately convex and simple, its upper margin feebly sinuato-truncate, 

 or (9) larger, arcuate at base and transversely tumid above the 

 middle. [Type Strategus cessus Lee.] Anastrategus 



12 Body oblong, more depressed as a rule; mandibles strongly and 

 acutely tridentate externally; propygidium very large, more or less 

 strongly sinuating the upper margin of the pygidium, which is never 

 transversely tumid in the female; larger anterior tarsal claw (cf) 

 simple or diversely toothed; stridulating organs well developed, 

 rather more so than in Anastrategus. [Type Corynoscelis quadridens 

 Tasch.] '. *Bothynus 



As Bothynus Hope, is represented only by neotropical species and 

 as only quadridens, of those in my collection, is certainly identified, 

 I omit any further reference to that genus, except to state that the 

 female of a species labeled cnnctator Mann., at hand, bears so close 

 a resemblance in general habitus to Strategus cessus Lee., that there 

 can be no further doubt of the propriety of erecting a distinct genus 

 for cessus and splendens to be placed in this tribe rather than in 

 the Oryctini. 



Ligyrodes n. gen. 



The species of this genus have hitherto been regarded as a section 

 of Ligyrus and most of the structural characters, including the 

 organs of stridulation, accord very well, but the sexual modifica- 

 tion of the anterior tarsi in the male, an important character in 

 itself, betraying a closer affinity with the Cyclocephalini, is supple- 

 mented by others, such as the transverse slit-like anterior abdominal 

 spiracles, nude apex of the post-coxal prosternal process and very 

 different general habitus of the body, so that the necessity for 

 generic separation from Ligyrus seems abundantly demonstrable. 

 In Euetheola, Ligyrus gibbosus and others of that type, the ab- 

 dominal spiracles on the inner slope of the lateral margins of the 

 first three segments, are broadly oval but only slightly transverse. 

 The stridulating area on the inner surface of the elytra is more 

 coarsely sculptured than in Ligyrus and consists of minute granules 

 forming close-set series. In Ligyrus gibbosus the granules are similar 



