the Early >S'/a^e.s 0/ Paltostoma scliineri. 191 



two outer lamince (fig. 6) are triangular^ witli acute apex ; 

 the inner edge {i. e. towards the middle line) is convexly 

 curved, the outer edge (towards the side of the body) is 

 sinuate, slightly concave towards the apex; near the inner 

 edge the substance appears more delicate, forming a paler, 

 more translucent area, the limits of which I have indicated 

 by a dotted line (fig. 6, p.a.). The two inner lamince are 

 somewhat different in form from the outer and from one 

 another ; fig. 7 shows their position relative to one another. 

 The entire substance of all four laminte, seen under a high 

 power, somewhat resembles a piece of plant-tissue, consisting 

 of elongate darker areas separated by a network of more 

 translucent lines. 



V. The Male Imago. (PI. X. figs. 9-14 ; PI. XI. fig. 15.) 



Williston's systematic description of the ^ was published 

 in Trans. Ent. Soc. London, 1896, pp. 269, 270. On pi. viii. 

 of that work (figs. 27 a, b) are figured the wing (not quite 

 correctly, as shown below by Lamb), the head and proboscis 

 in side view, and tlie hypopygium in side view. It is only 

 intended here to add structural descriptions of certain parts, 

 })articularly the mouth-parts. These descriptions are made 

 from the ^ dissected out of the pupa, various parts of which 

 have been mounted in balsam, and which has, as stated 

 above, been closely compared with one of Williston's co- 

 types. 



The specimen is sufficiently developed to contain a con- 

 siderable quantity of pigment, the most strongly pigmented 

 portions being : (a) the eyes, (b) a dark spot at the apex of 

 each of the palpi (see below), (c) a dark spot at the extreme 

 base of each femur, on the anterior side, at the point of 

 articulation with the trochanter (similar dark spots are 

 present on the femora of the J co-type and of the 2 ? ? ). 



There is no trace of differentiation of the upper and lower 

 facets of the eyes. AntenncB (PI. X. fig. 9) 15 jointed; 

 joints 1 and 2 large, joint 2 pyriform with apex subtruncate, 

 joint 3 shorter than those which foUoAv, much narrowed at 

 the base, succeeding joints about equally broad at base and 

 apex, joint 5 slightly longer than joint 4, joints 6-10 sub- 

 equal in lennth, joints 11-15 shorter, joint 15 with apex 

 bluntly rounded. Seen under high power, joints 4-15 bear 

 numerous fairly stout, short, sharp-pointed hairs, directed 

 apexwards ; joint 3 bears them only on its apical half, and 

 on joints 1 and 2 they are scanty. 



Mouth-parts (PI. X. figs. 9-11) conforming in general to 

 the usual Blepharocerid type (the cJ has no mandibles) ; 



