1885.] 119 



MEGALODONTES. 



Synopsis op the Species. 



1 (2) The appendages of the antennae equal in length to two of the joints ; an- 



tennae black or testaceous at the base ; mesonotum with only two, or no, 

 yellow marks ... Klugii, Leach. 



2 (1) The appendages equal to one of the joints, and yellow at the base. 



3 (4) The marks on thorax and abdomen clear bright yellow ; mesonotum with four 



marks ; antennae 17-jointed, yellow at base ; the 2nd abdominal segment 

 marked with yellow cephalotes, Fab. 



4 (3) The marks on thorax and abdomen white ; mesonotum with two or no 



marks ; antennae 15 — 17-jointed ; the base testaceous or bluish ; the 2nd 

 I , abdominal segment without any mark plagiocephalus, Fab. 



' Kltjgii, Leach, = spissicornis smd. 2yectinicornis, Klug. — The colo- 



ration is variable ; the mandibles are brownish or black ; the frontal 

 spots vary in size ; the band on vertex may be continuous or inter- 

 rupted in both sexes ; the tegulse may be yellow wholly or in part 

 only, or may be entirely black ; the spots on mesonotum may be 

 absent, as may be also the lateral spots on the two basal segments of 

 the abdomen. The coloration of the antennae varies also, but the 



i flabellations would appear to be always black. The J" ^^^ five of the 

 ventral segments yellow ; the 4th is much the widest above, this being 

 also the case in the ? . The length of the flabellations readily 

 separates Klugii from the other species. 



Cephalotes, Fab., = P«^2;er?, Leach ; plagiocephala, Fab. (pi. vi, 

 f . 10, vol. ii). — As with the other species, the colour varies. Grenerally 

 the markings are white, but occasionally (and especially on the abdo- 

 men) yellowish. The tegulse are occasionally black ; there are seldom 

 spots on the sides of the basal abdominal segment in the ? , one is 

 found usually on the third segment in the ^ , which has also the 

 bands on the 5th and 6th narrower than in the $ ; and also the ven- 

 tral segment broadly white ; in the ? there are usually only two of 

 the ventral segments banded with this colour. From cephalotes 

 (which it resembles in having the flabellations not longer than the 

 joints) it may be known by the white colour of the markings, by the 

 thorax having, at the most, only two marks, by the 2nd and 3rd seg- 

 ments not having yellow marks at the sides, and by the wings being 

 yellowish-brown almost throughout. 



I introduce this species as British on the authority of a specimen 

 in Shuckard's collection, bearing a label marked "from the British 

 Collection, Brit. Mus., Ap. 16/42." It was named " Panzeri;' but not 

 on the label itself. I am not aware of any records for the other 

 species besides those given by Stephens. 



