WYEOMYIA MITCHELLII 81 



side of the mesonotum in front, scarcely showing in the dorsal view; scutellum 

 testaceous, clothed with small, flat, dull brownish violet, spatulate scales and brown 

 border-bristles; metanotum deep to bright brown according to the light, with a few 

 chaetse arising from black spots towards its apex; pleurae ochraceous, with patches 

 of small, white, flat scales. 



Abdomen blackish, the scales showing dull violet reflections, border-bristles very 

 small and pallid; venter entirely clothed with dull white scales and a few black 

 ones apically, and with many straight black bristles at the apex. 



Legs long and thin, deep blackish brown with bronzy reflections, the hind femora 

 dilated apically, the last three mid tarsi and the apex of the first silvery white on 

 one side, except just at the apex of the last segment; ungues small, equal and 

 simple. Wings with brown scales, those on the apex of the two branches of the 

 second long vein slightly broadened, some of the other lateral vein-scales long and 

 rather thin, especially on the stem of the second and on the fourth; first sub- 

 marginal cell considerably longer and a little narrower than the second posterior 

 cell, its base nearer the base of the wing than that of the latter cell, its stem about 

 one-third the length of the cell; stem of the second posterior cell about two-thirds 

 the length of the cell; posterior cross-vein longer than the mid cross-vein, about 

 half its own length distant from it; mid and supernumerary cross-veins almost in a 

 straight line. Halteres with pale ochraceous stem and fuscous knob. 



Length. 4 mm. 



Time of capture. January (1904). 



Habitat. Jamaica. 



Observations. Described from a single perfect female taken by Dr. Grabham. 

 It can at once be identified by the white mid tarsi. This appears to be on one side 

 only, apparently the upper surface. 



It can be at once told from the other species by the above character and the 

 cephalic adornment. No special notes have been made on this insect. There are 

 more lateral linear scales to the wings than in the type of the genus, but it more 

 nearly approaches Dendromyia than Wyeomyia. 



Obiginajl Desceiption of Wyeomyia ochruba: 



The air tube is pale, with concolorous tip, with coarse single hairs. Pecten teeth 

 of the comb of the eighth segment simple. Subventral tuft of the anal segment, large 

 and stellate; lateral hair single. Abdominal hairs tufted. Mr. Busck collected the 

 larva at San Domingo, in the leaf stalks of young palms; it was named "Dendro- 

 myia sp." by Mr. Coquillett. We have it also from Mr. Urich in Trinidad, named 

 " Phoniomyia longirostris Theob." and from Surgeon W. Campbell in Dominica 

 named " Wyeomyia grayii Theob." What it would have been named the next time 

 it occurred, we do not know, as we propose to fix it now by a name of its own. 



The following is an abstract of the table : 



1. Anal processes equally developed 3 



3. Lateral comb of the eighth segment of many teeth in a long line. ... 4 



4. Comb a long row of single teeth, nowhere doubled 5 



5. Tube with coarse single hairs, all pale 6 



6. Air tube 3^/^ X 1; spines of comb scales shorter than the base. . ochrura 



Description of Female, Male and Larva of Wyeomyia mitchellii: 



Female. Proboscis moderate, swollen at tip, labellae small, rounded, with 

 fine outstanding sets ; vestiture bronzy black, narrowly pale beneath nearly to 

 tip. Palpi short, flattened, one-sixth as long as proboscis, bronzy black. An- 

 tennae moderate, the joints slender, subequal, rugose, coarsely pilose, black; 

 tori subspherical, with a cup-shaped apical excavation, brown, with a slight 

 pruinosity ; hairs of whorls long, rather sparse, black. Clypeus rounded, convex, 

 luteous brown, pruinose. Eyes separated at vertex by a narrow wedge, bluish 

 black. Occiput clothed with flat brown scales with iridescent reflection, a 

 small white spot at vertex, a patch below continued upward as a narrow border 

 along half of the eyes ; two long bristles at vertex and shorter setae along the 

 margins of eyes. 



Prothoracic lobes elliptical, distinctly separated, clothed with flat scales, 

 bronzy violet, narrowly paler at tip ; basal half silvery. Mesonotum clothed with 

 elliptical, flat dark-brown scales with a bronzy and blue reflection ; a few scales on 

 anterior margin and below lateral angles whitish ; seta over roots of wings dark 



6 



