174 THK ENTOMOLOGIST. 



Wings mainly clear, but with the costal region broadly fuliginous, 

 this narrowing toward the apex, but including the whole of the third 

 vein ; veins thick, dark reddish-brown. In venation this agrees with 

 Bihio as figured by Wilhston (N. A. Dipt. p. 142, f. 4), except that 

 the basal section of the third vein (from anterior cross-vein to first 

 vein) is shorter, and the cross-vein between the fourth and fifth is a 

 trifle longer. The hind femora are slender, and only about 2 mm. long. 



The male, as in modern species, has swollen anterior femora. 

 In this sex the dark colour of the wings appears to be redder and 

 more suffused. 



This is a perfectly typical Bihio, such as may be caught in 

 Colorado to-day, even to the structure of the anterior legs in the 

 male. 



Hah. Miocene shales ol Florissant, very abundant. The 

 Bibionid?e from earlier American Tertiaries belong to the less 

 specialized genus Plecia. I learn from Prof. Melander that a 

 yellowish Plecia was collected in the Florissant shales by 

 Scudder. 



Bihio dahins, Bellardi, is later than the fossil B. diihius 

 (Germar) Giebel, but as the latter was originally described (in 

 1837) under Phthiria, and is doubtfully a Bihio, the name of the 

 Mexican species can probably remain. 



Bihio gracilis, Walker, List Dipt. Brit. Mus. 1848, p. 123 

 (Canada and N. H.) is a homonym of B. gracilis, Unger, 1841. 

 Walker's species may be called Bihio slossonce, n. n., having been 

 added to the United States fauna by Mrs. A. T. Slosson. 



ON TWO UNDESCEIBED SPECIES OF SCOLIIDM 

 FPvOM BOKNEO. 



By P. Cameron. 



Discolia ornaticollis, sp.nov. 

 Black, the prothorax and scutellum rufous, the pro- and meso- 

 notum covered with stiff, depressed, red hair ; the scutellum and base 

 of metanotum more sparsely with longer paler reddish hair, the hair 

 on the head, pleurae, apex of metanotum, abdomen, and legs white ; 

 the clypeus, except for a large black mark on the apical half and the 

 mandibles, except at the apex, pale yellow. Abdomen distinctly 

 bluish violaceous. Wings uniformly fuscous violaceous, the nervures 

 black. S' • Length, 8 mm. 



Kuching, Borneo (John Hewitt, B.A.). 



Front and vertex smooth ; the metanotum in the centre strongly 

 but not closely punctured ; the sides are neither so strongly nor so 

 closely punctured. Except for a black spot on the sides near the 

 apex the prothorax is red. Apical abscissa of radius broadly roundly 

 curved. 



A distinct little species. 



