38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



lon<i-, and extending to lower extremity of brown part of parafacial; 

 third antennal senfment rounded; arista pubescent. Thorax with 

 the anterior pair of dorsocentrals at suture; scuteHum flat above; 

 sternoplcurals 2. Inner cross vein a little beyond middle of discal 

 cell ; apical section of fourth vein about 2.5 as lonii; as preapical. 



Len<ith, 3.5 mm. 



Type.— C2it. No. 41088, U.S.N.M. Mount Maquilincr, Luzon (C. 

 F. Baker). 



Genus CHAETOLAUXANIA Kertesz 



This genus, which was erected for the reception of a Formosan 

 species, should receive also tAvo species now before me, Poecilohae- 

 tenis quadrifu aetata de Meijere and P. sulphuriceps de Meijere. 

 These species agree in all essential characters with the genotype. 

 The general habitus is similar to that of Sajyvomysa, but the anterior 

 pair of orbital bristles are incurved, there are several conspicuous 

 bristly hairs on anterior part of cheeks, and the dorsocentrals are 

 arranged 1 + 2. A noteworthy character, though one of color only, 

 lies in the presence in all three species of a conspicuous black spot 

 on upper part of sternopleura. 



I present below a key for the separation of the three species, 



KEY TO THE SPECIES 



1. Face with a black spot in center of lo\^'el• margin and one between each an- 



tenna and eye; thoracic dorsum brown, with a broad bhiclcish central 



vitta whicli is overlaid with white dust quadripunctata (de Meijere). 



Face without black spots 2. 



2. Thoracic dorsum brownish, with two blackish spots in front of suture, and 



two submedian blackish vittae on its entire length. 



steruopleuralis Kertesz. 

 Thoracic dorsum entirely yellow sulphuriceps (de Meijere). 



I have examined the type specimens of the two species described by 

 Doctor de Meijere, these being sent to me by their describer. None 

 of the species are amongst my material from the Philippines, though 

 it is entirely probable that any, or all, of them occur in the islands. 

 The species are all small, averaging about 3 mm. in length, and the 

 wings are hyaline in all of them. 



In Doctor Frey's paper he described a variety of steimoplenrali'i 

 under the name lineolata. This variety he distinguishes by a dif- 

 ference of the thoracic vittae, but it is very possible that it is merely 

 an aberration and not a distinct variety. However, I have not seen 

 the specimen, which is from Mindanao. 



He also described a new species under the name tnjntnctifroiis 

 which is evidently distinct from, though most closely related to 

 quadripunctata. It has the ocellar spot and the spot between each 

 antenna and eye black, and the thoracic dorsum with a brown spot 



