234 MR. H. E. ANDREWES ON THE 



sight appeared to be the case. There is also a point to note in 

 connexion with the ligula, which, as in Callistus. is said to be 

 bisetose. Actually there are two long seta? placed close together 

 on the middle of the apical margin and directed a little down- 

 wards, but there are also some very fine seta? on each side. 

 These latter seem very liable to abrasion, but apparently there 

 are about three such minute hairs on each side of the apical 

 margin . 



Chaudoir thought that Callistus and its allies were related 

 to Arichonoderus, and in this he was folloAved by Lacorclaire. 

 Schaum and G. H. Horn put them near Chkenius, and both 

 Bates and Ganglbauer have followed this example. I agree with 

 the latter, but think that the unjointed outer lobe of the 

 maxilla? and the elongate inner one, together with the 

 pubescent palpi necessitate a separate group, in which I follow 

 so good an authority as Bates. 



I propose in the following pages to give first of all a brief 

 account of the generic characters, then a catalogue of the species, 

 followed by a dichotomic table, and finally descriptions of the 

 new species, together with additional notes on some of the old 

 ones, where the information afforded by their authors appeared 

 inadequate. In differentiating closely allied species I am aware 

 that it is generally undesirable to rely too much upon colour, but 

 in the insects which I am here considering, especially the smaller 

 ones, the structural characters vary little, and I have been com- 

 pelled to make use of the colour scheme in my table of species. 



Generic Characters. 



Ligula dilated and truncate at apex, bisetose but with some 

 additional minute seta? at sides of apex ; paraglossce membranous, 

 adnate to near apex, extremities rounded, extending rather beyond 

 ligula. Mentum edentate, lobes sharply contracted in front, not 

 much rounded, pointed at apex ; epilobes narrow, extending 

 slightly in advance of lobes. M axillae exceptionally long and 

 narrow, with relatively few bristles on inner margin, especially in 

 upper part, sharply hooked close to apex, outer lobe in one piece. 

 Palpi long, slender, setose, pointed at apex, penultimate of labials 

 plurisetose on inner margin. Mandibles long, almost edentate, 

 wide at base, slender and very sharp, but hardly hooked, at apex. 

 Labrum transverse, generally emarginate, sexsetose at apex, 

 minutely setose at sides. Clypeus truncate, a seta not far from 

 front angle on each side. Eyes prominent, one supraorbital seta. 

 Antenna? thick, setose, densely so from joint 4. 



Upper surface densely punctate and setose : hind angles of pro- 

 thorax usually acute, with a more or less deep emargination 

 between them and middle of base ; hind body subpedunculate ; 

 elytra 9-striate, with a fairly long scutellary striole between 

 suture and stria 1, base unbordered over first three intervals on 

 each side, sides without sinuation or visible internal fold near 



