58 [March, 



Reuterella helvimacula, Euderl. (1901), (Leptella helvimacula) Zoolog. 



Jahrb, 1901, p. 539; 1903, p. 375. Zoolog. Aiizeiger, 1903, p. 



133. 



S Imago. Expanse, tip to tip of fore-wings 5 mm. Antennae, head, thorax, 

 abdomen, and legs light brown in colour, with the callosities of thorax, a suffusion 

 round ocelli ana parts of abdomen darker; all coarsely hairj. Eyes and the three 

 ocelli blackish. Antenna? IS-jointed, half the length of anterior wings, pilose, with 

 long diverging forward directed hairs, from one to three times as long as width of 

 joint, two or three on each joint being much longer than the others ; the first joint 

 about as broad as long, the second slightly broader and longer and notched at tlie 

 apex, the third three times as long as second and not quite so broad as first, the 

 fourth to twelfth gradually diminishing in length and width, while the thirteenth 

 is two and one-half times as long as twelfth, constricted in middle and the tip 

 swollen into a papillaform or nipple-shaped prolongation bearing three long 

 diverging hairs and two or three short ones, the basal part haired as rest of 

 antennae. Maxillary palpi 4-jointed, light brown. 



Tarsi 2-jointed, second joint half the length of first. Tai'sal claws with 

 a small tooth beneath midway. Wings hyaline, their entire surface set with 

 microscopic hairs, which are rather closer and stronger in pterostigma, and on the 

 wing margins become thickened and scaly, causing the margin to appear toothed. 

 Veins brownish. Tooth on radius dark. Yeins on margin of anterior wings with 

 a row of hairs, excepting costa from base to nearly pterostigma and anal, which 

 are hairless ; in addition to this row a marginal fringe extends from before com- 

 mencement of pterostigma round termen of wings to dorsal margin near junction 

 with anal vein. The costal vein over pterostigma is thickened to double its width 

 and dotted with scattered hairs from scaly bases. There is a long hair on about 

 centre of area of terminal enlargement of pterostigma. Yeins and margins of 

 posterior wings hairless, with the exception of a row of six to eight haii's forming 

 a fringe on margin of cell of radial fork (^ 2nd sub-marginal cell). 



In the left anterior wing of the ^ from Chobham the radial and 

 median veins anastomise almost in a point (Fig. VII). The right 

 posterior wing of the Bognor and both posterior wings of the 

 Chobham specimen have the discai or connecting veinlet absent 

 (Fig. II). And the areole of right anterior wiug of the Bognor 

 specimen is imperfect, not reaching to margin (Fig. 111). These 

 are interesting aberrations. 



^ Imago. Length, labrum to telson li mm. Wingless. Antennae, head, 

 prothoras and meso- and metathorax below and on sides brown. Meso- and meta- 

 notum yellow. iSegments one to seven of abdomen yellow with brown markings, 

 eight and nine black-brown. Eyes small, blackish. Ocelli wanting. Head chan- 

 nelled in centre of vertex, channel forked in front forming division from frons. 

 Labrum coarsely, frons and clypeus thickly haired. Hairs on vertex more scattered. 

 Thorax and abdomen with fewer hairs. Anal appendages with long spiny hairs. 

 Antennae short, about half length of insect, similar in structure to those of (J only 

 smaller. 



