MEGALODONTES KLUGII. 87 



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. Meso- 



notum with four marks. Antennae 17-jointed, yellow at base ; 

 second segment of abdomen marked with yellow. Cephalotes. 



4 (3) The marks on thorax and abdomen white ; mesonotum with 



two or no marks. Antennae 15 17-jointed. The base test- 

 aceous or black. Second abdominal segment with no marks. 



Plagiocephalus, 



1. MEGALODONTES KLUGII. 



Tarpa Klugii, Leach, Z. M., iii, 131, 2. 



spissicornis, Klug, Ent. Mon., 187, 3; Htg., Blattw., 



317, 2 ; Zad., Schr. Ges. Konig., vi, 192, 

 pi. iv, f . 22 ; Andre, Species, i, 477 ; Cat., 

 60 * 23. 



pectinicornis, Klug, Ent. Mon., 194, 9. 



Black ; a triangular mark of variable size between the antennae, an 

 irregular mark touching the eyes opposite the antennae, a narrow line 

 on the head behind, and which at the sides curves round and is extended 

 to the posterior orbits of the eyes, more or less of the pronotum, a 

 mark on mesonotum, on either side of scutellum, a broad band on base 

 of abdomen, a spot on the side of second and third and a band on the 

 posterior border of each of the following segments above and on the 

 fourth and fifth beneath, yellow. Antenna testaceous, often black at 

 base and apex ; 17-jointed, the appendages on middle joints double the 

 length of joint. Legs testaceous; the knees, trochanters, and femora 

 more or less (and especially the four anterior), black. Knees, tibia?, and 

 tarsi with a decided yellowish tinge. Wings subhyaline, a large 

 brownish cloud in the radial and cubital cellules. Nervures testaceous. 



Length 12 lines. 



The coloration is variable; the mandibles are brownish 

 or black, the frontal spots vary in size, the band on 

 vertex may be continuous or interrupted in both sexes, 

 the tegulse may be yellow wholly or in part or entirely 

 black, the spots on mesonotum may be absent as may 

 be also the lateral spots on the basal two segments of 

 abdomen. The coloration of the antennae varies also, 

 but the flabellations would appear to be always black. 

 The c? has five of the ventral segments yellow ; the 

 fourth is much the widest above, this being also the 

 case in the ? . 



The length of the flabellations readily separates 

 spissicornis from the other species. 



" Britain/' Kirby, I.e. 



