526 SOME NEW AND LITTLE-KNOWN EXOTIC THYSANOPTERA 



eyes for about one-seventh the total length. Eyes somewhat 

 small and bulging, post-ocular spines apparently absent; 

 ocelli placed as in D. foveicoUis Bagnall. Antennae with the 

 third and fourth joint subequal, and the three apical joints 

 fusiform, long, and slender. 



Fore-legs slender, almost as in D. foveicoUis, tarsus armed 

 with a sharp and slender spur. 



Seventh and eighth abdominal segments each one-fifth 

 longer than broad, the seventh being a little longer than the 

 eighth. Tube rather stout, longer than either the seventh or 

 eighth segment, three times as broad at base as at tip, a little 

 more than three times as long as broad at base, and only 

 two-thirds the length of the head. 



Type. — In coll. Bagnall. 



Habitat. — Several males from the Isle of Nias (Karl 

 Jordan). 



D. malayeusis may at once be separated from D. foveicoUis 

 (Bagnall), D. grandis Bagnall, D. laevicollis Bagnall, and D. 

 propinqinis Bagnall, by the fact that the third antennal joint is 

 not longer than the fourth. It also differs considerably from 

 grandis and propiuqtnis in the relative lengths of the abdominal 

 segments, in these respects coming nearest to foveicoUis and 

 laevicollis, but possessing a decidedly stouter tube than either 

 of these latter insects. From D. chanpioni Bagnall (in which 

 the antennae are not described) it may be known by its smaller 

 size, the apparent absence of post-ocular bristles, the more 

 slender legs and less elongated abdominal segments ; from 

 D, distinctus Bagnall (antennae unknown) by the decidedly 

 more strongly produced forehead and the relative lengths of 

 the seventh and eighth abdominal segment; from D. nitidus 

 Bagnall (in which species, also, the form of antennas is un- 

 known) by the less strongly produced forehead, and from 

 D. hrevicornis Bagnall (of which we only know the ?) by the 

 longer antennae with the third and fourth joints subequal, and 

 by the more strongly produced head.* 



* These species are all Neotropical, and are described in a paper wliicli I hare 

 presented to the Linnean Society, but wliicli is not yet publislied. 



