38 
SECOND YARKAND MISSION. 
4. — Agabus dichrous, n. sp. 
Oblongo-ovalis, nitidus, subtus niger, supra testaceus, vertice nigro, rufo bimaculato , 
antennis pedibusque testaceis, femoribus in medio late nigris ; scutello fusco; elytris 
apicem versus vix fusco-nebnlosis. 
Long. 8 mm., lat. 4 mm. 
This species is closely allied to the European Dytiscus conspersus, Marsh., but is compara- 
tively narrower and more parallel, and the colour of the upper surface is more purely yellow 
and much less inf uscate : the dark mark on the head is much less extended towards the fronts 
and is deeply divided in the middle by a backward prolongation of the yellow colour. 
The male has the front tarsi moderately thickened, and their anterior claw is little 
thickened or toothed in the middle. The female I have not seen. 
A single male individual was found on the road across the Pamir from Sirikol to Panga, 
22nd April to 7th May 1874. 
Ilyobius (Munich Cat.). 
1. — Ilybius cinctus, n. sp. 
Ovalis, angustulus , parum convexus, subtus ferrugineus ; supra fusco- aeneus, prothoracis 
elytrorumque lateribus late testaceis , subnitidus subtilissime reticulatus. 
Long. 8J mm., lat. vix 4J mm. 
This is one of the smallest species of Ilybius, and is allied to the Japanese I. apicalis ; it 
is, however, smaller and narrower than that species, and the yellow lateral stripe is continued 
at the extremity to the suture, and close to the suture it has one or two angular prolonga- 
tions. The male has the front and middle tarsi a good deal incrassate, and their claws 
are nearly simple. 
Two individuals (in bad preservation) from Yangihissar, April 1878. 
Rhantus (Munich Cat.). 
1. — CoiiYMBETES PUL VE ROSES, Sturm. 
A female individual found at Sanju seems to be referable to this species ; it has 
not, however, the small central mark on the thorax that exists in the European specimens of 
the species, and it is possible that a knowledge of the male would show it to be a 
distinct species. 
Trogus (Munich Cat.). 
1. — Dytiscus rceselii, Eab. 
A female specimen of this common European species was found at Yarkand, 21st to 27th 
May 1874. 
