AET. 11 SIPHOSTURMIA AND ALLIED GENERA REINHARD 6 



tip; ordinary in male. No discals on intermediate segments and 

 without a marginal row on fourth in female. Venation of wings 

 normal, first and third veins setulose near base; first posterior cell 

 open well before apex of wing; no costal spine. Claws and pulvilli 

 minute in both sexes. 



MICROSILLUS BACCHARIS Reinhard 



Houghia baocharis Reinhabd, Ann. Ent. Soc. Amer., vol. 14, p. 332, figs. 5, 6, 

 1921. 



Male. — Front at vertex 0.375 of head width in the one specimen, 

 hardly widening downward; parafrontals gray pollinose with a 

 yellow tinge, the latter becoming more pronounced toward the ver- 

 tex extending on the upper part of the occiput and posterior orbits ; 

 elsewhere on head the pollen is wholly whitish, almost silvery; 

 median stripe uniform in width to triangle, distinctly narrower 

 than one parafrontal, reddish-brown; inner verticals long, directed 

 backward, the outer ones about three-fourths as large, diverging 

 posteriorly; ocellars and orbitals of equal size, proclinate; lower- 

 most frontal at middle of parafacial on level with apex of second 

 antennal joint, only the two pairs immediately above antennae de- 

 cussate; facial ridges hardly higher than middle of face, bare ex- 

 cept a few hairs next to vibrissae; the latter of good size and situ- 

 ated near edge of mouth; basal joints of antennae yellow, third 

 black, four times length of second and fully twice width of para- 

 facial below; arista of normal length, thickened to middle, black, 

 basal joints distinct but not elongate; proboscis rather slender, la- 

 bella apparently fleshy but rather small; palpi yellow, not much 

 thickened apically, bowed upward; cheeks sparsely covered with 

 short hairs; occipital fringe rather long on either side of vertex; 

 beard moderately long, wholly pale or whitish. 



Thorax gray pollinose, mesonotimi when viewed from behind with 

 an apparent yellowish tinge and showing four black stripes; the 

 outer ones triangular in front, constricted and slightly interrupted 

 at suture widening behind, thence tapering and stopping shortly in 

 front of postalar callus; the inner pair narrow, complete at suture, 

 extending about halfway to base of scutellum; pleura and humeri 

 cinereous; scutellum reddish on apical half, disk with changeable 

 gray pollen, entirely covered with short erect hairs; calypters 

 opaque, white. 



Abdomen black in ground color, the sides and narrow apex red- 

 dish ; first segment black, the three following broadly gray pollinose 

 with the hind margins shining in certain lights and subpollinose in 

 a flat rear view except on fourth ; venter reddish, with gray pollen on 

 first three segments; first and second segments with one pair of 

 median marginals (small on first) ; third with a marginal row of 



