OF THE TABANID^ OF THE UNITED STATES. 381 



Female. Facial callosities and checks Ijlack, tlie upper part of the former somewhat 

 brownish ; midtlle portion of the face dark ferruginous ; the usual pollen on the face and 

 around the black frontal callosity, gray. Antenna? black, first joint pale reddish. Thorax 

 with a broad glaucous middle stripe, divided longitudinally by a black line ; grayish glau- 

 cous lateral stripes; pleura? likewise grayish-glaucous, with the usual blackish stripes. The 

 first two abdominal segments are pale yellow on the sides ; the black on the first segment 

 occupies the whole base of the segment (and not the middle only, as in C. calUdits); the 

 A-shaped black spot on the second segment is rather broad in its outline, and its ends, pro- 

 longed alons: the hind margin, are as broad as the main bodv of the fi<i:ure (in C. caUidus 

 they are usualh' nai'rower) ; they" do not reach the lateral margin ; the yellow triangle en- 

 closed in the A-shaped spot is somewhat smaJler than in C. caUuhis. The other abdominal 

 segments are black, with narrow yellowish-gray margins, two or three of which expand into 

 triangles. Legs black ; Ijase of front tibia?, the major part of the middle tibia> and roots of 

 the four posterior tarsi reddish-brown. Wings : costal cell, cro.ssband and a narrow costal 

 border beyond, broAvn ; the crossband is rather narrow and attenuated posteriorly ; its distal 

 margin is very straight ; its proximal side does not fill out the proximal half of the discal 

 cell, which is hyaline ; a part of the fourth posterior cell is also hyaline ; a brown cloud on the 

 last section of the fifth vein ; otherwise the fifth posterior cell likewise hyaline ; the l)rown 

 border along the costa, between the crossband and the aj^ex, is but little broader than the 

 infuscated costal cell between the crossband and the root of the wing, and is narrowed at its 

 origin from the crossband, where a subhj-aline indentation almost severs it from the cross- 

 band the fifth longitudinal vein before the crossvein is yellow. 



Mab. North Conway, N. II., where I caught two females of this handsome species in 

 the middle of August, 1874. 



The smaller size, the coloring of the face and the j^eculiar picture of the wings easily dis- 

 tinguish this species from the two preceding ones. 



11. Chiysops pudicus n. sji. 



5 . Apical spot connected with tlic crossband, the hyaline triangle between them not crossing the second 

 lonu'itndinal vein: the apical spot invades but a small portion of the second submargin.al cell; both basal 

 cells, (excei)t at their extreme proxini:;l end), hyaline ; frontal callosity reddish ; first and second abdominal 

 segments yellow on the sides; the black on the second segment A-shajied. 



Lengtli, 8 mm. 



Female. Face, including the callosities, j^ellowish-ferruginous ; palpi reddish-yellow ; 

 antenna? : first two joints and base of third reddish, the remainder black ; front with a 

 grayish pollen ; frontal callosity reddish, usually with a black margin aboA^e. Thorax with 

 the usual stripes, glaucous above, grayish-yellow on the pleui\"v?. Abdomen : two first seg- 

 ments yellow ; the first with a black spot in the middle, the second with a stout A-shaped 

 black spot, not confluent with the first ; in some specimens the ends of the A-shaped spot 

 reach the hind margin of the second segment and expand beside it, in others they 

 are separated from the margin by a 3'ellow border. The third and fourth segments are 

 yellow, with a large transverse black spot in tlie middle, encroached upon by the triangular 

 enlargement of the yellow hind margin ; the relative extent of the black and the yellow 



MEMOIRS BOST. SOC. XAT. HIST. TOL. n. 90 



