1922] NATURAL SCIENCES OF PHILADELPHIA 263 



The measurements of the Bornean female are given last. Length 

 of body (all shrunken) <? 14, 9 13 and 14.5; length of pronotum 

 cf 4.7, 9 4.5 and 4.4; greatest width of pronotum c? 2.8, 9 3.3 

 and 3.3; length of pronotal lateral lobe c? 3.3, 9 3.3 and 3.3; 

 depth of pronotal lateral lobe c? 2.1, 9 2.2 and 2.2; length of tegmen 

 d 1 22.7, 9 24 and 25.4; width of tegmen c? 3.3, 9 3.4 and 3.4; 

 length of cephalic femur c? 5.1, 9 5.8 and 5.8; length of caudal 

 femur <? 11.1, 9 12 and 11.5; length of ovipositor 13 and 13.2 mm. 



The spines of the ventral margins of the cephalic and median 

 tibiae, though showing some development toward the claw-like 

 type found in Phisis, are as short as is usual in Xiphidiopsis, the 

 longest only slightly over twice the tibial width at that point. 



Phlugis thaumasia new species. Plate XXI, figures 2, 3 and 4. 



This insect agrees in every feature of generic importance with 

 the American genotype, P. teres (DeGeer). 94 It is the second 

 Malayan species to be described of this otherwise Neotropical 

 genus. 



Known from a single male, the specimen is found to agree closely 

 with the single known female of the other Malayan species, P. dubia 

 (Karny), described from Banguey Island, British North Borneo. 

 It is distinguished by the wholly unarmed caudal femora. We 

 believe that the male sex of the Bornean insect will show distinctive 

 genitalic differences. 



These species may be quickly separated from other Asiatic 

 Listroscelids by the prominent eyes, which are produced cephalad, 

 the short, declivent and non-projecting vertex, the large curved 

 spine of the cephalic coxae and distinctive limb armament. 



Type: cf ; Singapore, British Straits Settlements. (From C. F. 



Baker.) [Hebard Collection, Type no. 829.] 



In addition to the generic characters noted above, the following 

 are of diagnostic value. Size small, form slender, though not as 

 slender and delicate as the majority of the American species. 

 Maxillary palpi with fourth joint two -thirds as long as fifth, the 

 latter very gradually enlarging distad to its truncate apex. Pro- 

 notum cylindrical, moderately produced caudad, the metazona 

 two-fifths as long as the prozona; lateral lobes with ventral margin 

 horizontal, caudal margin oblique, showing only a faint offset 

 opposite the small, round but exposed thoracic foramen. Tegmina 

 and wings somewhat reduced, the former slightly surpassing the 



94 Except that the caudal femora have but two pairs of distal spurs, the dorsal 

 pair having disappeared. We, however, find this condition to be characteristic 

 of the majority of the American species of Phlugis. 



