156 



THE CANADIAN ENTOMOLOGIST 



acrostichals present; scutellar apicals absent or scarcely differentiated; three 

 sternopleurals; lower sternopleura with bristles only. 



Abdomen.— Kather short. Clothed above with short, reclinate bristles, 

 beneath with longer, more erect hair; on each side ventral portion of fourth 

 notum clothed with long, slender bristles (not confined to edge as in most species 

 of Sarcophaga) ; ventral plates not rounded posteriorly, fourth clothed with erect 

 hair. 



ChcBtotaxy. — Second segment without marginal bristles or, if present, 

 short, decumbent and inconspicuous; third with two, sometimes very weak; 

 fourth with complete marginal row. 



Genital Segments. — Both dull orange except that first is darkened anteriorly. 

 First much the larger, marginal bristles absent: second, flattened, vestiture 

 shorter than that of first; anal area small. Forceps slender, abruptly curved 



Fig. 22. — Metoposarcophaga spp., male genitalia. (Page 157.) 



at right angles to the basal portion, distal end slightly enlarged with a short 

 tooth directed forward; forceps in profile view except tip concealed by accessory 

 plate. Penis and accessory parts almost identical with those of M. mcurva 

 Aldrich. 



Described from nine male specimens. 



Range.— BnX\s\\ Columbia; Savary Island, July 13, 18, 20, 31, 1917, (R. S. 

 Sherman, collector). Holotype taken in same locality and by same collector 

 on July 18, 1917. 



The writer has two females which are obviously either M. incurva or M. 

 tothilli and though the posterior tibia is shorter than the tarsus, it is not as short 

 as in the males of these species nor does it present the peculiar structural modi- 

 fications found in M. incurva. 



