254 



SYRPHID^S. 



Gm. ; Pz. ; Mg. ; LI. ; Fin. ; Mq. ; Ztt. j St. F. et Srv. Nigro-eenea, 

 antennis ferrugineis apice nigris, thorace glauco-bivittato, alls limpidis, 

 abdomine atro maculis sex subtrigonis fulvis ornato, pedibus ferrugi- 

 neis, femoribus posticis supra nigris, tibiis posticis nigro-bifasciatis, 

 tarsis posticis subfuscis basi nigris. Long. 3^-4 alar. 6-7 lin. 



-3Cneous-black. Face, epistoma, sides of the peristoma, and under 

 side covered with whitish bloom ; sides of the peristoma yellow. An- 

 tenna3 ferruginous ; fourth and fifth joints black. Thorax adorned in 

 front with 2 short bluish-white stripes ; sides and breast covered with 

 yellowish-white bloom ; a slight black scapula along each side. Wings 

 colourless ; stigma pale brown. Halteres yellow. Abdomen velvety 

 black, adorned on each side with three almost triangular tawny spots. 

 Legs ferruginous ; hind thighs black above and towards the tips ; hind 

 tibia? adorned with two black bands ; hind tarsi slightly brown above, 

 black at the base. Fern. Front covered with tawny bloom ; third joint 

 of the antennae black above. 



Generally distributed. (E. S. I.) 



Genus X. XYLOTA. 



XYLOTA, Mq. d. i. 521(1834); Mg. zw. vii. ; Ct. ; Rdn. Musca p., 

 L. ; Dg. ; Shr. Syrphus p., Fb. e. s. ; Pz. Thereva p., Fb. ' Miles ia 

 p., LI. ; Fb. ; Fin. Merodon p., Fb. s. a. Xylota p., Mg. zw. iii. ; 

 St. F. et Srv. ; Ztt. Leptomyia (incl.), Nwm. 



Epistoma impressum. Antennae capitis latitudine conjunctim breviores ; 



articulus quartus dorsalis, quintus basi pubescens. Scutellum depres- 



sum, acutum. Areola subapicalis Integra ; lobus axillaris distinctus ; 



vence subcostalis et radialis ad marginem disjunct^ ; vena transversa 



prabrachialis trans medium areolce discalis locata. 



Body linear, stout. Head semicircular, depressed in front ; epistoma 

 smooth, or with some very little scapulas, obliquely truncate, impressed, 

 retuse beneath ; peristoma oval, straitened in front, curved upwards. 

 Labrum short, robust, notched at the tip. Lingua strong, acute, not 

 longer than the labrum. Maxilla? slender. Palpi cylindrical, subclavate, 

 somewhat hairy towards the tips, as long as the maxilla?. Labium 

 large, cylindrical. Antenna 6-jointed, approximate, seated on a tu- 

 bercle of the front, porrect, nutant, jointly shorter than the breadth of 

 the head; first and second joints small, bristly; second cyathiform, 

 broader than the first ; third patelliform, pubescent ; fourth and fifth 

 very minute ; fourth seated on the third at the base ; sixth long, setiform, 

 slightly pubescent at the base. Thorax subquadrate, with two humeral 

 scapula, and with a transverse suture ; scutellum semicircular, flat, 

 with a sharp edge. Wings lanceolate, very finely pubescent, incumbent 



