6 
SECOND YARKAND MISSION. 
ferior appendages long ancl stout, slightly curved, directed upward, yellow with concolorous 
hairs ; at the apex is a dense brush of spiniform yellow hairs, perhaps concealing a smaller 
apical joint ; from without this brush projects a flattened obtuse process, perhaps connected 
with the appendage, or perhaps distinct from it, and for its greater length lying in its 
concave inner side. Penis placed far internally, slender, slightly geniculate, yellow. 
In the ? the neuration and palpi are regular, and in details almost precisely as in 
D. pugnax ( vide my Revision and Synopsis of the Trichoptera of the European Eauna). 
Length of body 5| — 6 mm. Length of basal joint of antennse 3 mm. Expanse 
18 — 21 mm. 
The genus Dinarthrum was established by me in the Journal of the Linncean Society , 
Zoology, vol. xi, p. 116 (1871), for an insect from North India described as D.ferox,xn 
which the extraordinary basal joint of the antennas of the $ has a very strong basal tooth. 
Later on, in 1875, I described another species in the Neuroptera of Eedtschenko’s Travels in 
Turkestan, page 30 (and more recently in Part Y of my Monographic Revision and Synopsis of 
the Trichoptera of the European Eauna, page 279, pi. xxx, 1877), as I), pugnax, in which the 
said joint has two such teeth. In I). inerme there is no tooth. All the species hear consider- 
able external resemblance one to the other, and are only separable by structural characters. 
The form is very curious, and as is usual in this section of Sericoslomatidce, the sexes differ 
greatlyin appearance and structure : the nearest ally amongst true European insects is the 
genus Lasiocephala. 
SUMMARY. 
Only about 15 species of Neuroptera (in the broad sense) have been seen by me, viz., 
four species of Odonata (dragon-flies), one of Ephemericlce, three of Perl idee, one of 
Myrmeleonidce, three of Chrysopidce, and three of Trichoptera. 
The general aspect is European. All the Odonata are European, and two of them 
occur in Britain. The ant-lion {Myrmeccelurus) is a species of Eastern Europe. The 
Chrysopidce have nothing peculiar about them. The genus Dinarthrum in the Trichoptera 
was orginally founded on an Indian species, but I have since seen another species from 
Turkestan, so that the genus should probably be regarded as more Central Asian than Indian. 
