76 LOPHYRUS DOBSATUS. 



small mark on either side of vertex, testaceous ; belly reddish-testa- 

 ceous ; scutellum strongly punctured. 

 Length 3 lines. 



The ? may be known from the same sex in virens 

 by there being no fascia over the antennas, there being 

 only a small dark space surrounding the ocelli, by the 

 underside of the thorax bearing no black, and by the 

 scutellum being much less strongly punctured. 



The may be readily known from that of virens by 

 the spots on vertex, by the narrow testaceous line on 

 the pronotum, by the back of abdomen being entirely 

 black, the underside too being not red as in virens ; the 

 antennae are more slender, the last two joints are dis- 

 tinctly shorter than preceding, while in virens the last 

 three are of nearly equal length and considerably 

 thicker. Pallipes 3 is not so densely pilose as virens 

 3 and is much narrower, especially the thorax. 

 Andre gives the antennae as seventeen to twenty-jointed. 

 The specimens I have appear to have twenty-three joints. 



The larva has the head reddish-brown. The face is 

 more or less marked with black, the mouth darker, 

 mandibles brownish. Body dark green, sometimes 

 with a yellowish tinge, paler at the sides, and with a 

 dark dorsal and lateral stripe. Spiracles surrounded 

 with black. Over each ventral leg is a double dark 

 green spot, but they are not always clearly defined. 

 Legs banded with black. The coloration of the head 

 varies. 



The larvae are found during July, August and Sep- 

 tember, the flies early in June. 



The following parasites have been recorded : 

 Limneria argentata, L. larvincola, Schbrg. ; Meso- 

 chorus rubeculus, Htg. ; Tryphon adspersus, Gr. ; T. 

 lophyrorum, Htg ; T. im/pressus, Gr. ; T. tenthredinum, 

 Schbrg. ; T. variabilis, Rtz. ; Masicera gilva, Htg. ; 

 Tachina bimaculata, Htg. ; T. inclusa, Htg. 



Not common : Oban (Leach), Bishopton. 



Continental distribution : Sweden, Germany, France, 

 Switzerland. 



