NEW MYRMECOPHILOUS APHIDES. 53 



paler with dark lateral spots and dusky cross-bars, broken posteriorly by a median 

 pale line. Antenna? of six segments, the two first segments nearly equal in length, 

 but the basal one wider, the third the longest, about as long as the fourth and 

 fifth, the fourth shorter than the filth, fifth and sixth equal ; the third has twelve 

 sensoria on the apical two-thirds, the fourth five to six sensoria, the fifth three and 

 a large sub-apical one, the sixth three basally, then a group of three small ones, 

 and then two close to the large one beneath the " nail," which has one small one ; 

 hairs long as in troglodytes, " nail " longer than in the latter. Eyes large, black. 

 Body hairy. Head hairy with a marked median suture. Segments of the thorax 

 markedly distinct, especially the pronotum. Cauda short, rounded, with rather 

 long hairs. Cornicles slightly elevated, with large circular openings. Proboscis 

 long, reaching well beyond the third coxte, apex dark. The hind tarsus much 

 more than half the length of the hind tibia ; both are very hairy, but the hairs are 

 scantier on the tibia? ; posterior trochanters large. A distinct stemma above 

 each eye, the latter with a distinct ocellar process. 



Lenijtli. 3mm. 



Locaiitij. Blackgang Chine, Isle of Wight, 26 viii. 1913 (Donis- 

 thorpe) . 



Obserrations. Found in an ant's nest (Tetratiiorinni caespitinn). 



I think that this insect must be placed in Trama. It diflers from 

 T. trcxjlodijtes, first in general colour, secondly in the marked antennae, 

 and thirdly in the hmd tarsus. The marked ocellar process below the 

 eyes is very characteristic. It may be pointed out here that I have 

 always found a minute basal segment to the long hind tarsus in 

 trof/lodi/tes as well as in this species. 



FORDA HEXAGONA, nOV. Sp. 



Apterous viviparous female. Globular in form, somewhat flattened behind. 

 Head fiat and broad, slightly rounded at the sides ; the integument prominently 

 marked with hexagonal sculpturing, which also passes on to the pronotum, a few 

 short curved hairs in front. Antennae of five segments, rather more than J the 

 length of body : basal segment much broader and a little shorter than the second, 

 which is cylindrical ; third segment the longest, about as long as the fourth and 

 fifth together ; fourth swollen towards the apex where there is a single sensorium ; 

 fifth a little longer than the fourth, with a prominent blunt nail, one large and 

 four small sensoria at its base ; the third to fifth segments with a few markedly 

 capitate hairs, only slightly so on the two basal segments. Eyes small but 

 prominent, black. Kostruni reaching to the base of the third pair of legs. Legs 

 and antennae appear darker than the body, the legs with scanty hairs. Cauda very 

 dark, with numerous short, pale hairs. 



Len(jth, I'Smm. ; breadth 1mm. 



Localitij. Whitsand Bay, Cornwall, iv. 1909 (Donisthorpe). 



Obsercations. I have only seen one specimen found in the nest of 

 Foriiiira fii>ica. It had been preserved in alcohol so I cannot give its 

 colour. The marked hexagonal sculpturing separates it from the 

 other species of Forda. 



FoRDA FURCATA, nOV. Sp. 



Apterous viviparous female. Pearly to creamy-white ; domed ; segments 

 marked ; legs pallid, tarsi dusky. Antennse pallid, but darkened at the tips ; 

 rostrum pale, brown on the last segment, broad, reaching past the second pair of 

 legs; vertex broad, slightly rounded. Antennas moderately long, of five segments; 

 the first two small, about equal in size; the third the longest, as long as fourth 

 and fifth together, showing a slight constriction near the apex ; the fourth slightly 

 longer than the second, the fifth nearly twice as long as the fourth, all the seg- 

 ments with rather long simple hairs ; the fourth with a single sub-apical sensorium, 

 the fifth with one large and several small sensoria just below the short " nail." 

 Eyes very small, reddish, represented by 3 ocelli. Legs rather short, with dark tarsi, 

 with numerous rather stiff hairs on all the segments. Hairs on the head both 



