April, 1391.] 89 



tirst and second joints somewhat elongated, the first being, however, 

 much shorter than the second, which again ia three or four times 

 shorter than the third ; body large, with a wide oval abdomen, furnished 

 with numerous hairs and bristles ; fore tarsi dilated in the female, in 

 which sex the frontalia are wider than in the male, and have a double 

 instead of a single row oifronfo-orbital setae on each side. 



1 (8) Abdomen armed with bristles, but not clothed with soft hair. 



2 (7) Palpi filiform. 



3 (4) Abdomen subglobose and black 1- ffrossa,L. 



4 (3) Abdomen oval and ferruginous. 



5 (6) Antennae rufous 2. /era, L. 



6 (5) Antenuffi nigrescent 3. tessellata, ¥. 



1 (2) Palpi clavate (/aincja, Dsv.) 4. /eroo-, Pz. 



8 (1) Abdomen clothed with soft hairs as well as armed with bristles {servilUa, 



Dsv.). 



9 (10) Abdomen with the sides red .' 5. lurida,^. 



10 (9) Abdomen with the sides not red 6. iirxina, Mgn. 



E. GROSSA, L. 

 This handsome fly, the largest of the British Muscids, has the thorax, abdomen 

 and legs black. The face is yellow, and the cheeks, chin and all the back of the head 

 are clothed with yellow hairs. The first and second joints of the antennje are rufous, 

 the third is black, rather small, and not quite half so long as the second. It is not 

 common, and has been bred from cocoons of Bonihyx trifolii. 



E. FEEA, L. 

 This species varies a good deal, but it is characterized by the thorax being 

 black, with testaceous shoulders and sides ; by the abdomen being yellow and pellucid, 

 marked with a wide, longitudinal, dorsal black stripe ; by the face being yellow, and 

 the head clothed with yellow hairs ; by the antennae having the first two joints 

 rufous, and the third black, which is about half the length of the second ; by the 

 legs (including the tarsi) being wholly yellow in the female, but having the basal 

 halves of the femora black in the male. This is the most common species in tlio 

 genus, and has been bred from the cocoons of several moths. 



E. TESSELLATA, F. 



This species differs from E.fera by having the dorsal stripe on the abdomen 

 narrower, and sometimes interrupted ; by the thorax being grey rather than black, 

 with the front and sides pale, and with indistinct dorsal stripes ; by the face being 

 white, and the hairs on the occiput, kc, pale yellow ; by the legs being black or 

 piceous ; and the antenna} black or grey, with the second joint rufous at its extremity. 

 The third joint is wide and large, and only about one-third shorter than the second. 

 This species is rare. 



E. FEEOx, Pauz. 



This species is very similar in form and colour to the last. Its characteristic 



