Bucentes. 



471 



if not it is narrowed towards apex ; abdomen in male mainly 

 yellow, and more or less yellow in female; second segment 

 without or with a pair of more or less developed marginal 



bristles 3. 



Palpi elongated, especially in female; antennæ in male 

 moderately large, scarcely reacbing end of epistoma, tbird 

 joint not broad, attenuated towards apex; abdomen in male 

 mainly yellow, witb apex and a narrow middle stripe dark, 



in female witb basal part more or less yellow 1 . cristata. 



Palpi (generally) not elongated; antennæ in male large, 

 tbird joint broad, fully reacbing end of epistoma; abdomen 

 in male quite or almost quite yellow, and more or less to 

 quite yellow in female 4. flavifrons. 



1. B. cristata Fabr. 



1805. Fabr. Syst. Antl. 281, 9 {Stomoxys). — 1849. Stæger apud Zett. 

 Dipt. Scand. VIII, 3212, 5 (Siphona). — 1858. Zett. 1. c. XII, 4685, 1—2 

 (Siphona). — 1862. Schin. F. A. I, 521 (Siphona). — 1889. B B Denkscbr. Akad. 

 Wiss. Wien, LVI, 102, Tab. V, Fig. 83 {Siphona). — 1894. Pand. Rev. Entom. 

 XIII, 108, 3 (Siphona). — 1907. Kat. palåarkt. Dipt. III, 381. — 1921. Baer, 

 Zeitscbr. f. angew. Ent. VII, 368. — - Stomoxys geniculata Fall. (nec. De G.) 

 1818. Dipt. Suec. Haemat. 5, 2. — 1824. Meig. Syst. Beschr. IV, 155, 1 (Siphona). 



— 1838. Zett. Ins. Lapp. 620, 1 et 1844. Dipt. Scand. III, 989, 1, p. p. (Siphona). 



— 1824. Stein. Arcb. f. Naturgesch. 90, 6, 127, 2, p. p. — S. palpina Zett. 

 1859. 1. c. XIII, 6064, 1—3. — 1907. Kat. palåarkt. Dipt. III, 383. 



Male. Frons above con^iderably broader than the eye; jowls 

 narrow, the eye reaching slightly below the large vibrissa. Orbits 

 yellow, cheeks and jowls white, somewhat silvery; frontal stripe 

 yellow. Orbits below and just 

 upper part of cheeks with few, 

 fine and short black hairs, or the 

 orbits quite bare; jowls with few 

 black hairs. Occiput grey, yellowish 

 above, white below; it is sparingly 

 baired with whitish hairs below 

 and has above some few black 

 hairs behind the postocular brist- 

 les. Antennæ black with basal joints 

 red, third joint at least three or 

 nearly Jour times as long as second, 

 more or less attenuated or pointed 

 towards apex, the posterior margin 

 convex; it reaches scarcely or just pig. 98. Head of B. cristata S 



