72 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
Drosophila paradoxa Lamb. 1918. Bull. Ent. Research, 9, 159. 
3, 9. Arista with four branches above and one below. Antenne pale yellow. Second 
and third orbitals inserted at the same level. Only one prominent oral bristle. Carina 
absent. Palpi pale orange, clavate, with two small bristles near the tip. Eyes with sparse 
ile. 
‘ Acrostichal hairs in six rows; prescutellars well developed. A small dorsocentral bristle 
in front of the two that are usual for the genus. Mesonotum pale yellow, rather shiny. 
Scutellum and pleure pale yellow. Legs pale yellow. Bristles and hairs brown. 
Abdomen yellow, slightly shining; last two segments darker posteriorly. 
Wings clouded along anterior margin and posterior cross-vein. Costal index a little 
over 2; fourth-vein index about 1.6. 
Length body just under 2 mm.; wing the same. 
I have not seen this species. The above description is drawn entirely 
from Lamb’s admirable account of the type material. The species is known 
only from St. Joseph, Trinidad, West Indies, where it was collected by 
Mr. C. B. Willams. It is parasitic on a species of Clastoptera found on 
Casuarina trees. Williams collected about thirty spittle masses of this 
frog-hopper, and ‘‘about half of these contained Drosophila larve, most of 
which had their heads buried in the abdomen of the Clastoptera nymphs, 
the head being usually inserted between the dorsal abdominal plates.’ 
In the same paper Lamb has presented notes on another Neotropical 
species of Drosophila, found by Williams in the froth of a Clastoptera in 
Panama. The specimens were too fragmentary for description, and the 
same is true of one that Mr. Williams sent me. 
Group B. 
Small prescutellars present; wings clear; bristles and hairs brown; dull-colored species. 
Drosophila flore Sturtevant. 1916. Ann. Ent. Soc. America, 9, 339. 
o', 9. Arista with about four branches above and three below. Antennz dull brown, 
third joint darker. Front about one-third width of head, wider above; dull yellowish- 
brown. Second orbital one-half other two. Second oral bristle about one-third first. 
Carina broad, flat; face dull yellowish-brown. Cheeks yellow; their greatest width about 
one-eighth greatest diameter of eyes. Eyes with fine black pile. 
Acrostichal hairs in eight rows; prescutellars present. Mesonotum, scutellum, and 
pleure dull brown. Legs pale brown; apical and preapical bristles on first and second 
tibiz; preapicals on third. Bristles and hairs brown. 
Abdomen dark brown; basal segment with a yellowish-brown transverse band. 
Wings clear. Costal index about 2.5; fourth-vein index about 1.8; 5x index about 1.4; 
4c index about 1.0. 
Length body 2.2 mm.; wing the same. 
Specimens examined: Havana (type series), Guareiras, Cuba; Mayaguez, 
Adjuntas, Naguabo, Porto Rico (Lutz and Mutchler); Tegucigalpa, Hon- 
duras (F. J. Dyer); San Jose, Costa Rica. 
The species is to be found, often in great numbers, in the corolle of large 
flowers such as those of species of Datura, melons, etc. I have reared adults 
from Datura flowers collected in Costa Rica. Some of these took at least 
eight days to develop—probably longer. 
The chromosomes of D. jflor@ have been described by Metz (1916, Amer. 
Nat., 50, 592; see p. 39 of this paper). 
Drosophila bromeliz, new species. 
9. Arista with about five branches above and two below. Antenne yellow, third 
joint darker. Front about one-third width of head, wider above; yellow. Second orbital 
one-half other two. Second oral bristle less than one-half first. Carina prominent, flat; 
face pale brown. Cheeks pale brown; their greatest width about one-sixth greatest diam- 
eter of eyes. Eyes with fine short pile. 
