^0» A EEMAKKABLE New GALL-THRIPS FROM AUSTRALIA, 



Thaumatotheips feoggatti, n.sp. 



9, J.— Total leng-th of body, 2.3—3.7 mm. 



General colour dark, blackish brown. Fore-femora at apex and fore-tibiae 

 at base yellowish-brown, the latter gradually somewhat darker brown to apex. 

 Middle and hind tibiae, and all tarsi yellowish-brown. First and second antennal 

 segTaent as dark as the body; third joint yellow, somewhat darker at apex; 

 fourth segment brownish-yellow in the basal half, dark grey in the apical half; 

 fifth joint dark grey-brown, in the basal half somewhat paler; the following 

 ones uniformly blackish-brown, at most the sixth joint a little paler at base. 

 Freshly emerged specimens bright lemon-yellow, with uniformly pale antennae, 

 the legs somewhat shaded with grey; abdominal tergites 3 — 8 with a broad, dark 

 brown cross-band; tube reddish-brown. 



Head distinctly longer than wide across the eyes. Cheeks beginning with a 

 small protruding angle behind the eyes, then slightly converging posteriorly, 

 throughout their whole length finely gi-anulated and set with short, stiff hairs. 

 Eyes black, occupying about a fourth of the length of head, transverse truncate 

 behind. Between the eyes and the insertion of antennae only a very small in- 

 terval; fore margin of head between the antennae scarcely produced. Ocelli 

 always present, arranged in a rectang-ular triangle; the anterior one forwardly 

 directed, the posterior ones touching the midst of the inner margin of eyes. 

 Between the anterior and each posterior ocellus a short, hair-like bristle, another 

 behind each posterior ocellus. Dorsal surface of head finely reticulated. Post- 

 ocular bristles inserted near cheeks, about in the middle of length of head, long, 

 hyaline, curved forward, somewhat dilated at apex. A little behind these bristles 

 a second similar pair on the dorsal surface near the middle line. 



Antennae ' (Text-fig. 2) considerably longer than head, with stout segments. 

 First joint wider than long, cylindrical; the following ones longer than wide, the 

 second cup-shaped, the other club-shaped or subglobular, but always distinctly 

 constricted at the base; the tlrird longest, the following ones gradually diminish- 

 ing towards the apex. Segments 7 and 8 broadly united with one another, to- 

 gether fusiform. Eighth joint considerably smaller than seventh. 



First joint with a few bristles near apex. Second with a transverse row of 

 bristles near base, and another of longer ones near apex. Segments 3 — 5 with 

 such a row just before their middle, and a second one before the end. The bristles 

 of third joint especially long and stout. Sixth segment with a crown of bristles 

 near the apex. The following segments set only with a few weak setae. The 

 median line of bristles on the ventral surface reaching from about the middle of 

 seventh segment to apex of eighth. 



Sense-area of the second joint transversely ovate, placed just behind the 

 middle. Sense-cones of the following segments short and thick, blunt at apex, 

 only a little overreaching the end of their segments. Fourth joint, in ad- 

 dition to the lateral pair, with one accessory sense-cone in the middle of the 

 dorsal surface, and another on ventral surface near the posterior margin. On 

 the fifth and sixth segments the sense-cone of posterior margin often short, nearly 

 abortive. On the seventh joint I cannot distinguish the usual median sense-cone. 



Front set with very short hairs (smaller than those of the cheeks) on the 

 whole surface and, in addition, only a pair of short, weak bristles below the 

 insertion of antennae. Mouth-cone short, rounded at apex, reaching at most to 

 the middle of prosternum, usually still shorter. Palpi very short, stout, with a 

 styliform apical and an annular basal joint. Labial palpi still shorter than the 

 maxillary ones. 



