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 A HISTORY OF HERTFORDSHIRE HYDRIOMENID./E (continued) Hydriomena miata, L. St. Albans and Harpen- den (A. E. G.) ; Sandridge (Griffith) ; Hitchin (Durrant) ; Haileybury (Bow- yer) ; East Barnet (Gillum) ; Bricket Wood (Cutts) ; Watford (Heaton, Wigg) ; Wilstone (Elliman) ; Tring (Goodson) ; Cheshunt (Boyd) In most of the districts this insect is fairly common at ' light,' but Mr. Boyd has only taken one specimen in his locality sordidata, F. (elutata, Hb.). St, Albans and Bamville Wood Farm, Harpenden Common (A. E. G.) ; Sandridge (Griffith) ; Hitchin (Durrant) ; Haileybury (Bowyer) ; East Barnet (Gillum) ; Oxhey Wood and Bushey (Cutts) ; Watford (Spencer, Heaton, Wigg) ; Bushey Heath (Barraud) ; Tring (Elliman) ; Cheshunt (Boyd) A fairly common and very variable species trifasciata, Bkh. (impluviata, Hb. ; literata, Don. ; ruberata, Frr.). Haileybury (Bowyer) ; Watford (Heaton) A rare species. The Haileybury School List records the capture of one specimen of trifasciata and one of ruberata truncata, Hufn. (russata, Bkh. ; im- manata, Hw.). St. Albans, Hedges Farm, Bricket Wood, Welwyn and Bamville Wood Farm, Harpenden Common (A. E. G.) ; Sandridge (Griffith) ; Hitchin (Durrant) ; Hailey- bury (Bowyer) ; East Barnet (Gil- lum) ; Oxhey Wood (Cutts) ; Watford (Spencer, Heaton, Wigg) j Bushey Heath (Barraud) ; Oxhey (H. Row- land-Brown) ; Tring (Elliman) ; Cheshunt (Boyd) The two forms russata and im- manata are regarded by many ento- mologists as distinct species, and most of the Hertfordshire observers have treated them as such. In this list no attempt has been made to discriminate between them. Both forms appear to be fairly well dis- tributed through the county and both are common silaceata, Hb. Sandridge (Griffith) ; Oxhey Wood (Cutts) ; Watford (Spencer, Heaton, Wigg) Not common corylata, Thnb. St. Albans (A. E. G.); Sandridge (Griffith) ; Haileybury (Bowyer) ; Watford (Spencer, Wigg) ; HYDRIOMENIDJE (continued) Bricket Wood (Cottam) ; Oxhey (H. Rowland-Brown) ; Tring (Elliman) Hydriomena suffumata, Hb. St. Albans (A. E. G.) ; Sandridge (Griffith) ; Hertford (Stephens) ; East Barnet (Gillum) ; Oxhey Wood (Cutts) ; Watford (Spencer, Heaton, Wigg) ; Oxhey (H. Rowland-Brown) ; Tring (Elli- man) ; Cheshunt (Boyd) Local and not very abundant ; comes to ' light ' dubitata, L. St. Albans and Bricket Wood (A. E. G.) ; Sandridge (Grif- fith) ; Hitchin (Durrant) ; Hailey- bury (Bowyer) ; East Barnet (Gil- lum) ; Bushey (Cutts) ; Tring (Elli- man) ; Cheshunt Street (Boyd) Common in the Tring district, but apparently not very often met with round Watford. In Cheshunt Street it is scarce badiata, Hb. St. Albans and Bricket Wood (A. E. G.) ; Sandridge (Grif- fith) ; Hitchin (Durrant) ; Haileybury (Bowyer) ; Watford (Cutts, Spencer) ; Bushey (Cutts) ; Bushey Heath (Bar- raud) ; Oxhey (H. Rowland-Brown); Hemel Hempstead (B. Piffard) ; Tring (Elliman) ; Cheshunt (Boyd) Common at ' light,' sallows and on palings nigrofasciaria, Gz. (derivata, Bkh.). St. Albans and Bamville Wood, Harpen- den Common (A. E. G.) ; Sandridge (Griffith); Hitchin (Durrant); Hailey- bury (Bowyer) ; East Barnet (Gil- lum) ; Bushey (Cutts) ; Watford (Cutts, Heaton) ; Bushey Heath (Bar- raud) ; Oxhey (H. Rowland-Brown) ; Hemel Hempstead (B. Piffard) ; Tring (Elliman) ; Burton Grange (Boyd) Common at ' light ' and on palings rubidata, F. Sandridge (Griffith) ; Hailey- bury (Bowyer), ' Roman road,' School List ; East Barnet (Gillum) ; Bushey (Cutts); Hemel Hempstead (B. Piffard) albicillata, L. St. Albans (A. E. G.) ; Sandridge (Griffith) ; East Barnet (Gillum) ; Watford (Spencer, Wigg) ; . Hemel Hempstead (B. Piffard) ; Waltham Cross (Boyd) Not frequent. Only met with once at Waltham Cross unangulata, Hw. St. Albans and Bam- ville Wood Farm, Harpenden Common (A. E. G.) ; Sandridge (Griffith) ; Watford (Wigg) ; Berkhamsted (Goodson) ; Cheshunt Marsh (Boyd) Scarce 134