76 MANDIBULATA. NEUROFTERA. 



brassy-green above^ beneath yellow, slightly dusted with blue, the two 

 terminal segments wholly blue ; the margins black ; the last segments 

 deeply excised, furnished with four appendages ; legs black, whitish within ; 

 wings hyaline, stigma whitish, black in adults. Female with the eyes 

 rusty-luteous, the collar with the hinder margin reflexed, and deeply 

 bisinuated, forming an acute yellow prominence in the middle ; thorax 

 brassy above,- with an interrupted streak on each side, resembling a ! in 

 form, the sides and beneath sulphur-yellow; abdomen brassy, its sides and 

 below bright yellow, sometimes dusted with whitish ; legs yellow, with a 

 black streak without. 

 The adult males have the back of the head, the space between the wings, &c. 

 more or less dusted with blue. 



Found in Lincolnshire, in June. 



B. Four posterior tibiw dilated {caudal appendage of the males curved, and 

 resembling forceps). 



Sp. 13. platypoda. Alhidum, thorace strigis 5 longitudinalihus fusco-ceneis, 

 abdomine caeruleo aut lacteo, segmentis atro-teneo marginatis punctisque binis 

 notatis, tibiis 4: posterioribus dilatatis. (Long. corp. 16 — 17 lin.; Exp. Alar. 

 22—24 lin.) 



Ag. platypoda. Van. Linden, p. 37. — Ag. corea. Steph. Catal. 307. No. 3419. 



Head whitish, behind yeUowish or blue, with a streak in front, and a broader 

 one between the eyes, which are very remote, black ; collar rough ; thorax 

 whitish or bluish, with a broad central black streak (sometimes divided by 

 a narrow pale one down the back), and two narrow ones on each side, 

 somewhat interrupted anteriorly ; abdomen bluish, the 2nd segment with 

 three black spots, the four next with a longitudinal line, and the rest with 

 two lines ; the proportions varying in different examples ; legs whitish, the 

 four hinder tibise with a broadly dilated white membrane, edged with black 

 hairs ; wings hyaline, stigma rusty. Female reddish when the male is 

 blue, and with a black streak on the two basal segments of the abdomen. 



Var. /3. Ag. albicans. Leach MSS. — With the abdomen white, each of the 

 six anterior segments with a double black spot near the tip, and the extreme 

 edge also black, the remaining segments with two black streaks. 



Apparently not very abundant, or rather local, as it occurs some- 

 what plentifully in Walsham meadows, near Ripley, in July ; also 

 found in the New Forest and in Devonshire. 



Genus VIII.— LESTES, Leach. 



Wings narrow, thin and membranaceous, composed of numerous small 

 areolets, the greater portion of which (especially towards the apex) are 

 pentagonal, the fourth longitudinal nervure angulated ; stigma oblong. 



