EEV. A. E. EATON ON EECENT EPHEMEEID.E OE MAYFLIES. 35 



exceptions), uuiserial in a transverse row extending to the uervure next in advance of the 

 anal ; that nervure is forked sliortly, or beyond the middle. Aperture of the anterior 

 thoracic spiracle triangnlar, with a salient angular valve above, its lower lip straight ; 

 that of the posterior spiracle small and round. Seta3 2, in d" (pilose ?) about 2^ as long 

 as the body, in ? glabrous, about ^ as long as it. Proportion of d legs not observed. 

 Eyes of ? large for the sex ; the anterior ocellns rather smaller than the others. Slender 

 projections, easily lost, are prolonged shortly from the hinder lateral angles of the inter- 

 mediate abdominal segments ; 9th ventral segment of ? hardly produced behind into a 

 lobe, but cleft in the middle. 



Distribution. Cuba and Central America. 



Tijpe. L. ahnormis. Hag. 



Etymology . E.. M'^Lachlan, the British neuropterist. 



Lachlania abnormis. Hag. Plate III. 5 (wings, $ ). 



Lachlania abnormisl Hag., Proc. Boston Soc. Nat. Hist. (1868), 372-1, fi,<r. ; Packard, Guide to Study 

 of Ins. ed. i. 596, fig. 578 [after Hag.] (1870) ; Etu., Trans. Ent. Soc. Loudon (1871), 54, pi. i. 1 [after 

 Hag.]. 



Adult (dried), 2 . — Body above warm sepia-brown, beneath lighter; head, prothorax, 

 femora, and the spiracular border of the abdominal segment, piceous ; tibite and tarsi 

 lighter, especially the ungues ; setae whitish. Wings transparent sepia-grey, with an 

 intense blue-purple reflection, and light (Vandyke) brown neuration ; the finer of the 

 cross veinlets much lighter than the others. In the fore wing, a single series of cross 

 veinlets extends in a slight curve from the (functional) subcosta (no. 3) to the anterior 

 branch of the forked longitudinal nervure (pobrachial ?) next in advance of the anal (8) ; 

 the series is sometimes continuous, and sometimes broken by a slight displacement of 

 the second or third veinlet ; the posterior branch of the pobrachial is weak, and very 

 similar in colour and calibre to hindermost cross veinlet. Length of body, 2 , C-7 ; wing 

 9-10 ; seta; 5 mm. 



Sab. Cuba (Hag. & M'Lach. Mus.). 



Lachlania lucid a, sp. nov. Plate III. 5 (forceps). 



Imago (dried), 6 . — Tliorax piceo-fuscous ; abdomen fuscous, broadly annulated with 

 white near the joinings : forceps and seta? whitish. Pore legs and posterior femora fus- 

 cescent, tarsi and posterior tibia? Avhite, with dark ungues. Wing-neuration subfuscescent. 



? . Thorax luteo-piceous ; abdomen darker than in the c? ; in other details very 

 like the d . Wings tinted as in L. abnormis, the membrane rellecting bright (medium 

 smalt) blue. Length of body 11-12 ; wing, s 12, ? 11 ; seta;, 6 circ. 30, 2 7 mm. 



Sal). Guatemala (6 2, Paris Mus. Jardin des Plantcs) ; Central America (2 2 , M'Lach. 



Mus.). 



HOMCEONEURIA, Etn. 1881. 



Illnstratioiis. Adult (detail). PI. III. 6. 



j^cluit. — All of the nervures of the fore wing simple ; membrane decurrent from the 

 wing-roots, apparently destitute of any free epinotal appendage; no cross veinlets. 



