74 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 



less black. Wings grayish or yellowish hyaline; third section of the costal vein two-thirds 

 the length of the second section. Anal cell incomplete. Length 2 mm. 

 " Four specimens. St. Vincent." 



I have not seen this species, so have reproduced Williston's description 

 verbatim. There is not enough information in this description to make it 

 certain that the species belongs in the group typified by D. dubia; but I have 

 placed it here because of the high probability that the following form, which 

 clearl}^ belongs here, is merely a color variation of Williston's species. 



Drosophila splendida luteipes, new variety. 



Arista with about six long branches above and three below. Antennse yellow, brownish 

 above. Front about one-half width of head, wider above; bluish-black above, yellow 

 below. Second orbital exceedingly minute. Postverticals not evident. Only one promi- 

 nent oral bristle. Carina very small, confined to upper part of face; face pale yellow. 

 Cheeks dark brown; their greatest width about one-sixth greatest diameter of eyes. Eyes 

 nearly bare. 



Acrostichal hairs in six rows; no prescutellars. Mesonotum metallic bluish black. 

 Scutellum velvety black. Pleurae dull brown, yellowish below. Legs, including coxse, 

 pale yellow. Apical and preapical bristles on first and second tibise, preapicals on third. 



Four basal segments of abdomen yellow, with posterior black bands. Fifth segment 

 black. 



Wings clear. Costal index about 1.4; fourth-vein index about 2.7; 5x index about 

 2.0; 4c index about 2.0. 



Length bod}^ L8 mm.; wing 2 mm. 



Type and one paratype from Herradura, Cuba, 1915 (C. W. Metz). 

 Also seen from Bartle (C. W. Metz) and Havana, Cuba. 



As may be seen from the two descriptions given here, this form agrees 

 closely with Williston's description of D. splendida, except in the color of 

 the legs. I have therefore described it as a variety of that species. 



Group D. 



Shining dark species; live in flowers. 



Drosophila lutzii Sturtevant. 1916. Ann. Ent. Soc. America, 9, 340. 



cf, 9. Arista with about four short branches above and two below. Antennse yel- 

 lowish brown. Front over one-third width of head, wider above; opaque dark brown 

 orbits and triangle polished. Second orbital about one-fourth other two. Only one large 

 oral bristle. Carina rather broad, flat, edges sharply angled; face brown. Cheeks brown, 

 their greatest width about one-fifth greatest diameter of eyes. Eyes with short, sparse pile. 



Acrostichal hairs in six rows; no prescutellars. Mesonotum, scutellum, and pleurae 

 dark reddish-brown, somewhat poUshed. Legs pale yellow^ish-brown, femora somewhat 

 darker. Apical and preapical bristles on first and second tibiae, preapicals on third. All 

 bristles shorter than is usual in the genus. 



Abdomen yellowish brown, Ughter toward tip. 



Wings clear. Costal index about 2.1; fourth-vein index about 1.7; 5x index about 1.3; 

 4c index about 1.1. 



Length body 1.7 mm.; wing 1.5 mm. 



Specimens examined: Biscayne Bay (Mrs. Slosson), Miami, Key West, 

 Florida; Guane (F. E. Lutz), Havana (type material), Guareiras, Aguada 

 Pasajeros, Cristo (F. E. Lutz), Guantanamo (C. W. Metz), Cuba; Hope 

 Gardens, Jamaica (C. W. Metz); Naguabo, Mayaguez, Adjuntas, Porto 

 Rico (Lutz and Mutchler); Mexico City, Mexico (R. Muller); Port Limon, 

 Costa Rica. This species is possibly the same as D. fusca Coquillett, from 

 Porto Rico; but the type of that species is lost, and the description does 

 not entirely fit this form, or any other known to me, especially with respect 

 to the orbital bristles. 



D. lutzii is very common in many parts of the tropics. It is to be found 

 in large numbers in the flowers of certain plants. I have collected it in 



