328 Prof. O. Heer on the House Ant of Madeira. 



than in the majority. The wings are hyaline, whitish, with 

 yellowish veins. 



2. The Male. 



Fig. II. magnified ten times. As before mentioned, I found 

 only a single example, which was moreover broken to pieces on 

 the journey, the head and thorax only remaining perfect. In 

 fig. II. 1, the dotted portion (the abdomen) is sketched merely 

 from memory. 



Length of the head J of a line ; of the thorax J ; breadth of 

 the same ^ a line. 



It is much smaller than the female, the length of the soldier, 

 and of a coal-black colour; the legs only are light yellow, 

 with however the coxse and trochanters black. The head is 

 small and nearly circular ; its mandibles are small, scarcely per- 

 ceptible ; the palpi, on the other hand, are somewhat longer 

 than in the female. The head is smooth, bearing in front the 

 approximate antennae ; these are long, setaceous, and seventeen- 

 jointed. The first joint is the thickest, the second of the 

 same length, as also the 7-8 following; but thence they be- 

 come gradually shorter, and more abruptly separated from 

 each other; whence the last seven joints can be much more 

 easily distinguished from one another than the first ten. All 

 the joints (with the exception of the first and last) are cylindric 

 and thickly pubescent. The thorax is considerably broader 

 than the head, bluntly rounded anteriorly ; the hinder edge 

 of the mesonotum with a row of longitudinal excavations ; 

 the scutellum subtriangular, its edge also beset with impressed 

 punctures; the abdomen oval. In the wings, the inner discoidal 

 cell is larger than in the females. The legs are of finer make 

 than in the females. The femur is thinner, the tibia propor- 

 tionally longer (fig. ii. 2). The hook at the fore part of the 

 tibia (cf. fig. 11. 3) is differently formed; it is curved, and also 

 furnished on the inner side with a row of setae, which are not 

 however attached to a membranous fiap (hautlappen*), and are 

 not pectinate. The tarsus is much shorter than in the female; 

 the first joint about the length of the second and third together ; 

 the second, third and fourth are of equal length ; the fifth 

 is thickened outwards, and with two sharp claws. 



3. The Labourer. 

 Fig. IV. — IV. 1, the size of nature; iv. 2, magnified ten times. 

 Whole length \\ line; length of head f line; breadth the 

 same ; length of thorax ~ line, of abdomen \ line. 



* " Hautrande " (membranous border) before, in description of the 

 female. — Tr. 



