TWO NEW MYRMECOPHILOUS APHIDES FROM ALGERIA. 



31 



projecting beyond the body, femora much thicker and shorter than 

 the tibige ; tarsi longer than in the two front pairs ; the basal segment 

 of the feet, small ; tibise and tarsi hairy, hairs very fine and short. 



Length. — 3 mm. 



Immature viviparous female.- — Colour varying from pale yellow 

 to dull brownish grey. Legs pale yellowish brown. Antennae 

 with the last two segments pale brown ; two basal segments short, 

 about equal length, the basal one broader than the second, the third 

 the longest, about as long as the fourth and fifth, which are equal, a 

 sensorium on the apex of the fourth and one at the base of the short 

 blunt nail on the fifth, with two to four smaller ones surrounding 



Forda rotunda, nov. sp. 

 A. Head of mature apterous female ; c, antennre ; c^, further enlarged apex ; 

 b, proboscis; b', mandibles; b^, maxillae; a, eye; a^, eye further enlarged. B. 

 Head and antenna of immature female. D. Front tarsus. E. Proboscis. F. 

 Lateral view of cauda. G. Hind tarsus. 



it, all the segments with small hairs. Eyes small and black, not so 

 projecting as in the adult. Proboscis reaching just to the third 

 coxae, of similar form to the adult. Legs longer in proportion than 

 the adult, well projecting from the body, otherwise similar. Cauda 

 rounded, hairy, hairs long and curved apically. 



Length. — 2 to 2*5 mm. 



Habitat. — Hammam Meskoutine, E. Algeria. 



Time of Capture.— A^xil 3rd, 1913. 



Notes. — One mature female and four immature ones taken 

 in ants' nests {Tapinoma erraticum). 



There is no doubt that these are all one species, although the 

 mature form looks very different, its swollen appearance, its white 

 kid-like upper surface and flat brown venter with marked segmen- 

 tation is very characteristic, the younger forms are more Forda- 

 like, whilst the adult approaches a Tycheoides in appearance but 

 the antenna? are i^orf^a-like. The hairy cauda is prominent in all. 



The types of both species have been placed in the National 

 Museum at South Kensington. 



