NEUROPTERA. 
5 
Family — SERICOSTOMATIDJU. 
Dinarthrtjm inerme, n. sp. 
10 $ , 4 ? , the latter in spirits, Leh, 7th September. 
Male brownish, clothed with greyish-brown pubescence. Basal joint of antennae rather 
longer than the head and entire thorax united, its basal portion black, but the apical portion 
brown ; somewhat compressed laterally, nearly straight, but with a slight bend in the basal 
portion to about the middle, unarmed, but the basal half beneath has a very dense fringe of 
thickened black hairs ; this portion above, and all the apical half, are furnished with long out- 
standing grey hairs : thread of the antenna: longer than the wings, pale-yellow, very distinctly 
annulated with brown up to the tips. Maxillary palpi long and slender, with a small ter- 
minal joint ; the basal portion clothed with long and dense thickened 1 and ordinary grey 
hairs, intermingled (but with no short ‘ scales ’), the terminal joint with ordinary hairs only. 
Labial palpi small and slender, pale-yellowish. Legs pale yellow. Anterior wings greyish ; 
the costal margin for more than half its length from the base lias a very dense inturned 
fringe of thickened blackisli-grey hairs; the membrane lightly clothed with short greyish 
pubescence, and with numerous small, deep, black ‘scales’; but there is a broad median 
longitudinal space free from ‘ scales,’ limited inferiorly by a narrow groove extending from 
base to apex ; apical fringes greyish, very long on the apical portion of the inner margin : 
neuration pale ; discoidal cell short ; nerves very irregular below the groove, forming large 
cellules. Posterior wings slightly paler than the anterior, with a few scattered black 
‘ scales ’ on the costal portion, but otherwise with only slight and very short greyish pubes- 
cence ; fringes very long and greyish ; discoidal cell very short. 
The 9th dorsal segment of the abdomen rather broad, brown, its margin produced in 
a triangular form, fringed with yellowish hairs ; from each side of it proceeds a large yellow 
triangular plate with the apex considerably produced and sub-acute, apparently connected 
with two yellowish median parts, little prominent, and separated one from the other. In- 
Dinarthrum inerme, MeLaelilan, male. 
Fig. 1. Head, &c., from side. 
2. Neuration of wings. 
3. Apex of abdomen, above. 
4. Apex of abdomen, from side. 
1 Under the microscope, with a high power, each of these thickened hairs has a peculiar rugose appearance. 
