97 



Dacus africanus, Adams. 



(The Kansas University Science Bulletin, Vol. Ill, No. 6, October, 1905, 



pp. H9-208.) 



This is a species of fruit fly described in the above publication by C. F. 

 Adams, in a paper entitled " Dipt era Africana, 1." The specimens were 

 collected by Mr. F. L. Snow, near Salisbury, Rhodesia, South Africa. 



- Male : close to D. brevis, Coq., and D. sigmoides, Coq., from Cape Colony. 

 Head yellow ; front reddish-yellow in the middle, greyish pollinose along the 

 orbits, ocellar dot, frontal lunule, three spots on orbits, and a spot in the 

 centre of front, black ; the three spots on orbits each bears a black, bristly 

 hair ; a vertical and post-vertical bristle present ; face straight, sloping on 

 the sides ; cheeks yellow, and furnished with a black spot below eyes ; occiput 

 yellow and reddish-yellow variegated ; antennte about as long as head, yellow, 

 tip of third joint and arista largely blackish. Thorax opaque reddish, finely 

 scrobiculate, sparse pile whitish ; humeri, a stripe beginning on upper margin 

 of stern opleunv, traversing the mesoplenrse and along transverse suture to 

 near middle of mesonotum, a spot on metaplura?, the scutellum, except the 

 extreme base, and halteres, yellow ; two small spots just in front of transverse 

 suture, two large ones behind it, a stripe just in front of the yellow of the 

 mesopleurse, the sternopleurse largely, two spots on metanotum and meta- 

 pleura largely blackish ; three small black bristles between humeri on anterior 

 margin of thorax, one on side just behind humeri, one at base of transverse 

 suture, one postalar, one transalar, an apical pair of scutellar bristles, and one 

 mesopleural bristle present. Abdomen reddish, finely scrobiculate, and with 

 whitish sparse pile ; third segment laterally along posterior margin, with a 

 short row of black bristles; venter yellowish. Legs light yellow; coxae 

 blackish at base ; femora on apical fourth, tibia? wholly, the tarsi apically, 

 reddish-yellow. Wings hyaline ; a fuscous stripe along first vein, from base 

 to apex, thence along costa to tip of third vein, and another one along lobe of 

 anal cell to wing margin ; auxiliary cell rudimentary ; tips of third and fourth 

 veins nearly straight ; small cross- vein inclined forward. Length, 7 mm." 



One specimen collected in June. 



List of Walker's species. 



These species of the genus Dacus were described by him, from specimens 

 collected by A. K. \Valbu-c in the Malay Archipelago, in a series of papers 

 entitled "Catalogue of Dipterous Insects/' tfcc., eleven in number, published 

 in the Proceedings of the Linnean Society between the years 1857 and 

 1865. These descriptions are very brief, and as the types are not in existence, 

 or, at any rate, their whereabouts unknown, it is very difficult to determine 

 any of his species. The descriptions can be seen in the Pro. Linn. Society of 

 the years mentioned. 



1. Dacus absolotus. VoJ. VI, 1862, p. 22. Ceram. 



'2. addens. Vol. IV, 1860. p. 149. Macassar. 



3. ;, areolatus. Vol. V, 1861, p. 295. Batjan. 



4. biarcnatus. Vol. VIII, 1865, p. 122. New Guinea. 



5. bilineatis. Vol. IV, 1860, p. 150. Macassar. 



6. concisus. Vol. VII, 1864, p. 227. Waigoe. 



7. contrahens. Vol. IV, 1860, p. 151. Macassar. 



8. curvi/er. Vol. VII, 1864, p. 229. Waigoe. 



9. co-nformis. Vol. I, 1857, p. 34. Singapore, Celebes. 

 10. detrudcns. Vol. VIII, 1865, p. 135. Salawatti. 



3957 D 



