136 Mr. R. M‘Lachlan’s Monegraph of the 
Posterior wings shorter than the anterior and about the same 
breadth ; discoidal cell closed ; forks 1, 2, 3 and 5 present; fringes 
short. Legs short; intermediate tibize not dilated in the female ; 
anterior tibiae with two unequal apical spurs; intermediate and 
posterior tibize each with two pairs of long and nearly equal 
spurs. Abdomen short and slender, more robust in the female. 
In the male there is a long filamentous process on each side of 
the abdomen, placed between the fourth and fifth segments; a 
rather prominent lobe proceeds from the upper margin of the last 
segment, beneath which is the short penis, thickened at the slightly 
notched apex; app. sup. apparently wanting; app. inf, long and 
bisarticulate. 
Larva unknown, frequenting streams. 
Diplectrona, Westwood= Aphelocheira,* Stephens. 
The serrated antenne and short broad form will readily enable 
the student to identify this genus. The lateral abdominal fila- 
ments in the male are very curious, and unique in the Order ; they 
are present in 4. flavomaculata, Steph., and 4. meridionalis, Hagen 
(from Corsica), but are wanting in 4. Ladogensis, Kol. (from 
Russia), and in 4. obesa, Hag. MSS. (from Lapland). The two 
Jatter species are much larger and differ in general habit, perhaps 
forming a new genus. 
1. Diplectrona flavomaculata, Stephens. 
(Pl. VII. fig. 5, neuration; Pl. XIII. fig. 20, app.) 
Aphelocheira flavomaculata, Steph. (*) Ill. p. 179, 1 (4836); wb. 
pl. 32, fig. 3 (var.?); M‘Lach, Ent. Ann. 1862, p. 36. 
Antennze brown, slightly annulated, the serrations darker. 
Head thickly clothed with golden-brown hairs. Palpi brown. 
Mesothorax dark-brown, with brown hairs. Anterior wings 
greyish-brown, obscurely spotted with yellowish; three rather 
Jarge dark brown spots towards the anal angle; fork 1 not 
reaching the transverse vein closing the discoidal cell; fork 2 
* The generic name Aphelocheira, employed by Stephens, cannot be re- 
tained, it having been used by Westwood to designate a genus of Hemiptera, 
in the Magazine of Natural History for 1833, three years prior to the publi- 
cation of the sixth volume of Stephens’ Illustrations (Mandibulata).. In 
his “Generic Synopsis,’? Westwood changed Aphelocheira to Diplectrona, 
and this is the next oldest name. This, however, is not equivalent to Diplec- 
trona of Brauer (Potamaria, Kolenati), which is allied to—if indeed it be 
really separable from—Tinodes. I cannot admit Kolenati’s objection to 
Diplectrona—viz., that the same name had been previously employed in 
Ornithology 
