494 Mr. H. E. Andrewes on Oriental Caiabidse. 



Very little seems to be known of the early stages and life- 

 history o£ these insects, but the larva o£ Creagris labrosa, 

 N.ietn., has been described and figured by Schaum (Berl. ent. 

 Zeit. 1864, p. 116). Mr. T. G. Sloane (whose important 

 paper on the Helluonini in Proc. Linn. Soc. N.S.W., 1914, 

 should be read by anyone studying the group) tells us that 

 the species of some Australian genera (not Macrochilus) are 

 found under the bark of trees, others having terrestrial habits. 

 One South-African species of Macrochilus, as Father O'Neil 

 of Salisbury informs me, has certainly been taken under bark, 

 and both lie and Mr. 0. N. Barker of Durban have records 

 showing that other species come to light in the evening. In 

 India 1 have seen many examples of M. trimaculatus, Oliv., 

 c miing to light; my note on them reads "always at light, 

 they fly into the room and settle at once, without any fluttering 

 around." I have other records showing that specimens have 

 been taken under stones and on grass. 



In the species of this genus there is considerable variation 

 in the buccal organs, the structural characters of the body 

 being fairly constant. Thus, the ligiila is generally etnar- 

 ginate in front, but sometimes straight (impictus) and some- 

 times arcuate (vitalisi). The labium is sexsetose, but the seta? 

 aie arranged in various ways. The tooih of the mentum is 

 sometimes glabrous, sometimes setose. The form of the palpi 

 also varies a good deal, and the penultimate joint of the labial 

 palpi is sometimes bisetose, sometimes plurisetose. I have 

 made use of most of these characters in an attempt to 

 differentiate the species. 



I propose to give first a fresh description of the genus, 

 then a catalogue of the species, followed by a dichotomic 

 table, and, finally, descriptions of the new species. I have also 

 added a few notes on some of the old species, which I thought 



might be of use. 



Generic Characters. 



Ligula fairly wide, deeply impressed at sides on under 

 surface for reception of the squama palpigera, from which 

 results a more or less well-developed longitudinal keel, which 

 disappears or forks about middle and is succeeded by a central 

 channel to near apex ; at least one pair of setse towards apex 

 and sometimes others along sides of channel. Paraglosso3 

 present (in all species I have dissected), rudimentary, mem- 

 bianous, whitish in colour, shorter than ligula and attached 

 to it at base (generally visible only after dissection, and then 

 from above). Maxillce with a row of stout setae on inner 

 margin, apex smooth, hooked, and sharp. Falpi stout and 



