1907] 
LOVELL AM) COCKERELL^ MEGACH ILIDAE 
1!> 
below, middle of lower margin presenting a slight angle; eheek.s beneath with a 
strong but obtuse tooth, hairy without, eoneave and shining within; antennae 
blaek, flagellum slender, obseure reddish beneath, last joint not discoid. i\le,so- 
thorax den.sely punctured in front, more sparsely iti the middle. Legs blaek, coxae 
with strong but only moderately large s|)ines; anterior femora keeled beneath, |)o.s- 
teriorly with much white hair, anteriorly excej)t the broad u])per margin, yellowish- 
ferruginous; their tibiae ferruginous beneath, blaek above; their tarsi flattened and 
somewhat dilated; the first joint narrowly eoneave beneath, the eoneavity light 
ferruginous and fringed on either margin with short blaek hair; .second joint 
reddish, cordate; a dense fringe of long white hair behind, from the a|)ieal two-fifths 
of the tibia to the third joint of the tarsus; middle and hind legs ordinary; claws 
bidentate, without a basal tooth. Wings dusky hyaline, margins not clouded, 
tegulae brownish-black. Abdomen broad with numerous small shallow ])unetiires; 
1st segment clothed with long hoary pubescence; 2nd, 3rtl and 4th segments with 
obscure white fasciae on the extreme sides in apical grooves, hut iii general effect the 
abdomen is blaek and bandle.ss; 6th segment with earina .strongly notched, apical 
margin with two median and two lateral teeth; and in addition a median ])romi- 
nenee, all of these being short and relatively incons])ieuous; ventral segments four. 
Two males on Epilobium angustifolium, July 30th. very distinct six'cies, 
superficially like .1/. melanophara. 
MeG.VCHII.E DECIPIEXS n. sp. 
(5'. — Length a little over 12 mm.; width of abdomen about 4 mm.; blaek, 
moderately shining; hair of head and thorax long and white, dark fuscous on 
vertex, middle of mesothorax, and partly on seutellum; mandibles coarsely striato- 
punctate, the apical tooth large, the second small, the third rudimentary; antennae 
black, flagellum faintly reddish beneath, la.st joint not flattened; vertex broad, 
shining, with .scattered punctures, Mesothorax with close and distinct but rather 
shallow punctures; tegulae black, wings dusky, rpiite dark; legs black, with white 
hair, yellowish on inner side of tarsi; anterior coxae with a strong dentiform 
angle but no spine; anterior tarsi slender and rpiite simple with a fringe of white 
hair behind; anterior femora entirely black; claws strongly liifid with no basal 
tooth, .\bdomen rather short, the first two segments with white hair, the others 
with black hair; hind margins of second and following segments with den.se pure 
white hair bands, on 2nd only at sides, on 3rd and 4th very weak in the middle; 
0th segment vertical, with a prominent transverse keel, which is not at all dentate 
or crenulate, but is very broadly truncate, the truncation eoneave; beneath there i.s 
a median transverse gently rounded elevation, and a very small tooth on each side 
easily overlooked; ventral .segments four. 
