10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



PACHVOPHTHALMUS FLORIDENSIS Townsend 



Pachyophthalmus floridensis Townsend, Ent. News, vol. 3, p. 80, 1892; An. 

 Ent. Soc. Amer., vol. 4, p. 130, 1911. — Coquillett, U. S. Bur. of Ent., 

 Tech. Ser., No. 7, p. 80, 1897.— Smith, Ins. of New Jersey, p. 778, 1909.— 

 Aldrich, Cat. of N. A. Dipt., p. 447, 1905. — Johnson, Bull. Amer. Mus. 

 Nat. Hist., vol. 32, art. 3, p. 72, 1913.— Walton, Proc. U. S. Nat. Mus., 

 vol. 48, p. 182, 1914.— Reinhard, Ent. News, vol. 30, p. 283, 1919.— Cole 

 and LovETT, Proc. Cal. Acad. Sciences, vol. 11, p. 301, 1921. 



Sarcomacronychia unica Townsend, Trans. Amer. Ent. Soc, vol. 19, p. 101, 

 1892. 



Sarcomacronychia sarcophagoides Townsend, Canad. Ent., vol. 24, p. 165, 

 1892. 



Sarcomacronychia trypoxylonis Townsend, Bull. Ohio Exp. Sta., Tech. Ser., 

 1, p. 165. 



Sarcomacronychia trivitatta Townsend, Proc. U. S. Nat. Mus., vol. 43, p, 

 363, 1912, type from Peru deposited in U. S. National Museum, examined 

 by me. — Rau and Rau, Wasp Studies Afield, p. 331, 1916. 



Male. — Front at narrowest point 0.25 of extreme width of head 

 (measurements of five as follows: 0.22, 0.23, 0.24, 0.27, 0.27); 

 frontal vitta narrowest near middle, where it is one-half to three-fifths 

 width of parafrontals; parafrontals silvery pollinose, outside the 

 frontal rows bare or with sparse microscopic bristly hairs; vibrissae 

 the length of the second antennal joint above front edge of oral 

 margin; facial ridges bristly on lowest half; third antennal joint one 

 and one-half times length of second; arista thickened on basal fourth; 

 penultimate joint slightly longer than broad; proboscis almost equals 

 the head height; labella small and laterally compressed; palpi black. 

 Thorax with the usual three black vittae, extending over the scutellum; 

 three postsutural dorsocentral bristles; scutellum with three nearly 

 equal marginal bristles and small preapicals. Abdomen black ex- 

 cepting the last segment which is red; the three posterior segments 

 thinly gray pollinose, usually to the apex; the intermediate segments 

 with three large, more or less rectangular black spots; first segment 

 bearing strong median marginal bristles; second with median mar- 

 ginals and several lateral bristles, which become weaker as thc}^ ap- 

 proach the median line; third and fourth with a marginal row of eight 

 to twelve. Genital segments rufous (pi. 2, fig. 12) ; inner forceps 

 nearly straight when viewed from the side; outer forceps pale yellow, 

 much less massive than the inner pair, apical two-thirds slender and 

 rounded in cross section; penis with a black, laterally compressed, 

 heavily chitinized hood, consisting of a large, irregular anterior 

 process and a small slender posterior process connected by a narrow 

 translucent membrane; anterior claspers much shorter than the penis, 

 tapering forward to a strong blunt point. Wings with one or two 

 small bristly hairs near the base of the third vein ; penultimate section 

 of the fourth vein equaling one-half the preceding section. Pulvilli 

 longer than last tarsal joint; hind tibia on the outside, with an incom- 



