WYEOMYIA APOKONOMA 73 



Length : Body about 4 mm. ; wing 4 mm. 



The single specimen was captured in bamboo woods in the daytime. 



Panama. 



Tabernilla, Canal Zone, adult captured in bamboo woods, May 3, 1907 

 (A. Busck). 



This species is referred by us to Wyeomyia, although the generic characters 

 are not well shown. The strip of integument between the eyes is very narrow 

 and but slightly wedge-shaped ; the prothoracic lobes are rather closely approxi- 

 mated, and more prominent than is usual in the genus ; the cross-veins are in- 

 cident, and the wing-scales broad and asymmetrical, all the characters showing 

 an approach to Sdbethinus. The species is therefore intermediate, but the char- 

 acters are not sufficiently prominent to keep the species out of Wyeomyia, nor 

 do they warrant the erection of a separate genus for the species. 



WYEOMYIA APORONOMA Dyar & Knab. 



Wyeomyia aporonoma Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 227, 230, 1906. 

 Wyeomyia aporonoma Busck, Smiths. Misc. Colls., quart, iss.. Ill, 71, 1908. 



Original Desceiption of Wyeomyia apobonoha: 



The air tube is pale, straight, tapered only near tip, with scattered single hairs. 

 Lateral comb of the eighth segment of scales in a broad band, beginning above in 

 single teeth, then a double row below, the teeth smaller. Anal segment with the sub- 

 ventral tuft small and stellate. Anal plate and tube with a black basal border. 

 Body hairs fine, stellate. 



The junior author got the larvae at Sonsonate and San Salvador, Salvador; Santa 

 Lucrecia, Mexico; Port Limon, Costa Rica. They were in cocoanut shells, a hollow 

 In a stump of a banana tree and cacao shells. The species was named " Dendro- 

 myia f quasiluteoventralis Theob." but we have been averse to adopting a name 

 so doubtful. 



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 of teeth in a band, at least in part two rows deep 7 



7. Tube without false pecten 9 



9. Tube straight, tapered only near tip; tube and plate with black basal 



ring aporonoma 



DESCBEPnON OF FEMALE, MALE, AND LABVA OF WYEOMYIA APOEONOMA: 



Female. — Proboscis moderate, the tip somewhat expanded, the labellse small, 

 rounded, with fine outstanding setae ; vestiture bronzy black, silvery whitish be- 

 neath nearly to tip. Palpi short, flattened, one-sixth as long as proboscis, 

 bronzy black. Antennae moderate, the joints slender, subequal, rugose, coarsely 

 pilose, black; tori subsphericaJ, with a cup-shaped apical excavation, blackish, 

 with a silvery-white pruinosity; hairs of whorls long, rather sparse, black. 

 Clypeus rounded, convex, silvery pruinose. Eyes separated at vertex by a very 

 narrow wedge, bluish black. Occiput clothed with flat black scales, with a blue 

 reflection, a small coppery metallic spot at vertex and a large white spot at 

 lower part of sides; two long setae at vertex and a row of short ones along 

 margins of eyes. 



Prothoracic lobes rather large, collar-like, remote dorsally, clothed with flat, 

 coppery-golden scales with violaceous reflection; a row of setae along anterior 

 margin. Mesonotum clothed with elliptical, flat dark-brown scales, with bronzy 

 and blue reflection; scales below lateral angles with brassy luster; bristles at 

 roots of wings reddish brown, those on anterior margin dark. Scutellum trilob- 

 ate, with vestiture similar to and continuous with that of mesonotum, each lobe 

 with a small tuft of brown bristles. Postnotum elliptical, prominent, with a 

 broad, low, median carina, black in the middle, luteous laterally, a group of 



