838 



LXXXI, Figs. 6 and 7), lateral cephalic thorns as in Figure 4, Plate 

 LXXXII. Thorax differs from that of nofatns in having near the 

 hase of the wing sheath, in longitudinal line with the bifid tu1)crcle at 

 base of posterior leg sheath (Fig. 5), a sharp-pointed tubercle, and 

 midway from base to apex of wing case, on its median line, 2 small 

 wartlike protuberances on a common base. Abdominal spiracles c- 

 shaped, very similar to those of Mydas clavatns, the open side directed 

 cephalad; the abdominal armature (Fig. 20) similar to that of Asilns 

 iiotatiis, differing noticeably only on the apical two segments, the 

 penultimate segment in vcrtchratiis having strong thorns on dorsum 

 as on other segments, while in notatus there are only hairs similar to 

 those of the ventral segments; the difference in the apical segments of 

 the two species is shown in Figure 14, Plate LXXXI, and Figure 2, 

 Plate LXXXII. 



The pupa from which the above description was drawn resulted 

 from a larva obtained at Havana, 111., April 24, 1905, and the imago 

 emerged July 24, 1905. 



The larva is predaceous, feeding upon the larvse of Lachnosterna, 

 and the species is distributed throughout the entire state, though not 

 very common in most localities. 



Dkromyia winthemi Wiedemann 



Dasi/pogon winthemi Wiedemann, Dipt. Exot., 1821, p. 223. 



Diogmites misellus Loew, Beri. Ent. Zeitschr., 1866, p. 22. 



Dcromyia wintJiemi Van der Wnlp, Tijdscli. v. Ent., Vol. 25, 1883, p. 93. 



Fiif'a. — Length, 20-25 mm- Brownish yellow, distinctly shining; 

 thorns dark brown. LTpper pair of cephalic thorns directed forward 

 and curved slighth' downward, distance between them distinctly 

 greater than that between them and upper one of the 3 lateral thorns ; 

 lateral thorns as in Figure 16, Plate LXXX, the lower one without 

 basal projection. Prothoracic spiracle reniform apically, distinctly 

 elevated ; a distinct wartlike swelling on disc of thorax just above 

 wing base ; the pair of thorns in front of wing base on lateral margin 

 of disc of thorax very long, curved backward at their middle ( Fig. 

 14) ; wing cases without central protuberances, their apices in vertical 

 line with second abdominal spiracle and much proximad of apices of 

 sheaths of fore legs. Abdomen with transverse rugae except on por- 

 tion of first segment anterior to the transverse series of thorns, where 

 the rugae are longitudinal; armature of abdomen rather variable, nor- 

 mallv as follows : first segment with a transverse series of stout 

 tliorns near anterior margin, whicli are broadest at middle, stand up- 



