204 



[September, 



OBSEEVATIONS ON COCCIDM (No. 9). 



BT R. NEWSTEAD, F.E.S., 

 CUEATOR OP THE GBOSVENOE MnSEUM, CHESTER. 



EXiEEETOPUS, n. g. 

 ? adult covered at gestation with a felted sac. Anterior tarsi 

 dimerous. Mentum monomerous. Anal cleft and lobes as in the 

 LecaniidcB. 



Ex^EETOPUS FOBMICETICOLA, 11. sp. 

 ? adult oviparous, subterranean, more or less reddish-brown, margins pale, 

 " with two purple lines on the dorsum " (Luff, in lit.) ;* rather widely ovate, narrow 

 in front. Mentum short, widely rounded ; unexpanded filaments shorter than the 

 mentum. Anal cleft deep. Anal 

 dorsal lobes triangular when flat- 

 tened, inner side slightly longest. 

 Anal ring with eight short hairs. 

 Antennee (fig. 1) of eight joints, of 

 which the 2nd, 8rd, 4th, 5th are 

 longest; 8rd longest of all, 8th 

 smallest ; there is a short spine on 

 the 1st, a very long hair on the 

 2nd, one on each of the 5th, 6th, 

 and 7th, and six of seven on the 

 last. Legs very long : intermediate 

 and posterior pairs much the longest 

 (fig. 2, posterior leg), normal ; tibise 

 not quite as long as the tarsi, in- 

 dented near the centre on the upper- 

 side, but no trace of articulation : ' | j / 

 anterior legs (fig. 3) with the tarsi dimerous (fig. 4), the articulation nearly in the 

 centre ; widely and deeply divided above, for about one-third of its length ; on each 

 side the chitine is stronger and darker ; the rest of the articulation quite evident, 

 but rather faint. In nearly every case the 2nd joint is curved inwardly (figs. 3, 4) ; 

 in one instance the two joints are placed almost in the same plane, and the deep 

 division in front quite closed, rendering the articulation quite straight, with a very 

 short constriction on either side of it in front. In this instance had the joint been a 

 false one, there must have been an extreme fracture beneath ; nothing of the kind, 

 however, has taken place, and the joint appears of equal strength throughout ; there 

 is a small hair near the apex of the 1st joint, and four or five near the apex of the 

 2nd ; digitules to tarsi long, slender, scarcely dilated at extremity, those of the 

 claw much dilated at both extremities ; claw rather long. The articulations of all 

 the joints are very clear, especially the tibio-tarsal joints. The tarsi of the front 

 legs are attached on the under-side by two dark chitinous projections or flaps. 

 Dermis with numerous short spiny hairs, numerous at the margins, and on abdo- 

 minal segments. Long., 2'50 — 3"50 mm. ; wide, 1"50 — 1 mm. 



Seen only in a single specimen. 



