NO. 1146. RICl'OliT ON JAPANESE DIPTEHA—COQUILLETT. 325 



ERISTALIS TENAX Linnaeus. 

 MuHca tenax LiXNAF.rs, Fauna Siuic, 17H1, p. 17!t9. 



Five mules ami three females (No. 004). A I'^uropean species which 

 also occurs in the ITiiited States. It was previously recorded Irom 

 Jai)aii by J)r. Loew.' 



ERISTALIS INCISURALIS Loew. 



Krixlalin inciHitraliH I><)i;\\, Wiener I'^nt. Moii;its(!li., 18."»s, p. 108. 



i'\)ur males and three females (No. 062). The species was originally 

 des(!ril)ed from Japan. 



ERISTALIS OCULARIUS, new species. 



Male and female: Head black, the veite.x, a large space at base of 

 antennae, and the fa(;ial tubercle highly polished, face elsewhere 

 opaque, yellowish-gray prninose, the cheeks thinly gray pruinose; in 

 the male, an o]»a(|U(' ])r()\vnish prninosc; spot below the lowest ocellus, 

 and the lower triiiiigle opacpie, yellowish-gray i>ruinose ncvt the eyes; 

 in tbe female, an opaipie, velvet black fascia near the middle, bordered 

 below with a yelli»wisli-gi-ay piiiinosc spot which extends along the 

 ey(?s to the face; hairs of fr(»iit and of nppei- part of occiput black, 

 remaining hairs of (xjciput, of face an<l cheeks, whitisli; antennae 

 brown, the under margin of the third joint yellow, the arista very sliort 

 piiliescent; eyes yellowish, thickly maik«Ml with puri)Ie dots sind larger 

 si)ots, and thinly covered with hairs. Thorax ])oli8hed black, the lat- 

 eral margiiiR and pleura opaipie, giay jnuinose, mesonotum of female 

 marked with live gray prninose vittac;; the sparse haiis of mesonotum 

 chieHy yellow, those of the pleura whiti.sh; scutellum polished black, 

 its hairs mixed black and yellow. Abdomen of nmle opa(]ue, velvet- 

 black, the sides and posterior margin of the tiist segment, a lateral sjiot 

 and the middle of the posterior margin (»f ea(;h of the three following, 

 polished, leaden-gray, most extended on the fourth; abdomen ot female 

 similar except that the lateral spots are gray pruinose, those on the 

 thirtl and fourth segments united, forming a (Mossband which is emar- 

 ginate in the middle of its posterior side, lifth segment wholly polished; 

 hairs of alxlomen short and sparse, those of middle of dorsum mixed 

 black and yellow, the others chiefly yellow. Legs black, extreme 

 apices of femora, basal third of the tibiae, first two Joints of the front 

 and middle tarsi, an<l the lirst joint of the hind ones, yellow. Wiug.s 

 hyaline, stigma yellowish, a small black spot at its base. Halferes 

 yellow. Length, 1 1 fo J.J mm. Three males and seven females (No.OTOj. 



Tyj)c.—^o.:VM\ry, C.S.X.M. 



' Wiener Kut. .MonatHcli., 1858, p. 108. 



