1903.] 187 



aspidiseana, Hb., in colouring it nearly resembles the tvne toimmerana, 

 Tr. (not candidulana, Nik., = the species which has passed under the 

 name of ivimmerana, Tr., teste Wilk., in English collections), but it 

 differs in the much less distinct costal streaks, and the almost total ex- 

 tinction of theocelloid patch, as well as in its larger size (IS— 22 mm.). 

 I first met with it at Vernct in May, 1H99, and subsequently, in the 

 beginning of June the same year, at Monte Carlo, and put it aside as 

 probably a variety of some known species. Finding it again at 

 Thues-les-bains in the following year, as late as the end of June, I 

 was still unable to recognise it, but having met with two specimens at 

 Tangier in March, 1902, I have no hesitation in identifying them all 

 as strigulatana , Knl., described from " Lusitania." The Morocco 

 specimens are slightly larger than the European, but cannot be 

 separated from them by any other distinguishing character. The 

 range of the species appears to be fairly wide. 



(To be continued^. 



HELP-NOTES TOWARDS THE DETERMINATION OP BRITISH 

 TENTHREDINIDJT, &c. (4). 



BY THE REV. F. D. MOEICE, M.A., F.E.S. 



SYNOPTIC TABLE OF GENERIC CHARACTERS. 

 Each Section of this Table is numbered on the left ; a figure in 

 brackets following refers back to the Section last quitted ; the figures 

 on the right indicate the Section to be next consulted. 



a. area, n. nerve (transverse), ss. saw-sheath, ahd. abdomen, ant. antennae, 

 mand. mandible, clyp. clypeus, h.io. hind-wing (alar characters unless otherwise stated 

 are taken from the fore-wing), before = nearer the base, after = nearer the apex. 



1 Discoidal n. ends on the subcosta—ai or before the origin of the cubitus. 



Ant. mostly with 9 joints, sometimes fewer, very seldom more. Pro- 



notum always deeply emarginate. (Earn. Tenthredinid.e) 13. 



Discoidal n. ends on the cmS?7«.5— generally much after its origin. Ant. 



generally with about 18 joints or more, the intermediate joints gene- 

 rally very short in comparison with their breadth, and subequal...2. 



2 (1) Base of pronotum deeply excised. (Fam. Siricid^) H. 



Base of pronotum slightly emarginate, or truncate. (Fam.LTDTDa:)...3. 



3 (2) Basal three joints of ant. longer than all the rest together, and phenome- 



nally thicker! Third joint at least as long as the whole of those 

 following. (Very small insect with delicate glassy and pale-veined 

 wings, and the ? with an extremely long toothless saw) Xyela. 



Ant. otherwise constructed *• 



4 (3) Ahd. broad and flattened above : apex of front tibise with two spurs. ..5. 



Ahd. long and narrow, laterally compressed : front tibise with one spur...?. 



S 2 



