284 General Notes. [March 
Historical researches in the Coleoptera generally gave a very 
unfavorable result, contrary to Lespés’s views. That author states 
that in the Carabidz the pits are found on the four first joints, 
but Hauser could discover them in none which he examined. 
Usually only tactile bristles occur, so also in the Cerambycide, 
Curculionide, Chrysomelidz, and Cantharide. 
Olfactory pits, however, without doubt occur in Silpha, Necro- 
small pits occur irregularly on the terminal joints; besides, in 
this species on each side of the terminal joint is an apparatus, 
which is like the compound pit generally occurring in the Dip- 
era 
Very remarkable pits occur in the anténnal lamellae of Melo- 
lontha vulgaris and other Lamellicorns. Only on the outer sur- 
teeth descri in Chrysopa. Similar teeth occur on the max- 
illary and labial palpi of beetles. Dytiscus marginalis possesses 
at the end of each terminal palpal joint a group of very small 
lontha vulgaris, etc. In Carabus violascens were detected on 
the maxillary palpi large, plainly microscopical, white disks 
ses a are surrounded with a great number of extremely small 
teeth. 
_ Whether the above-described organs on the palpi of beetles — 
should be considered as olfactory or gustatory in their nature 
