1907.J 21 



Mr. A. W. Bacot exhibited a specimen of Catocala nupta, taken at rest at 

 Hackney, November 9th, 1906, remarkable for having two well developed tarsi on 

 the left fore-leg ; also three ? specimens of Lasiocampa querciln, L., bred from larvae 

 from Cornwall in 19U6. One of these larvae had been submitted to a pressure of 

 from 10 to 30 atmospheres (105 to 450 lbs. per square inch) on two occasions ; 

 a pressure which had proved fatal at once to a frog, used as a control experiment. 

 A discussion followed in which Dr. F. A. Dixey, Dr. Greenwood, and other Fellows 

 joined. Dr. T. A. Chapman, a long series of Hastula hyerana, Mill., bred this 

 year from larva) collected at Hyeres ; and a diagrammatic map of the neighbour- 

 hood to explain the distribution of the species in that area. Dr. F. A. Dixey, 

 specimens of Terauolus omphale, Grodt., bred by Mr. Q-. A. K. Marshall. The 

 exhibit showed that under arranged conditions of moisture and warmth the wet- 

 season phase might be artificially induced. Mr. L. B. Prout read a paper entitled 

 " Xanthorho'eferrugata, Clerck, and the Mendelian Hypothesis." Dr. F. A. Dixey 

 communicated a paper " On the Diaposematic Resemblance between Huphina corva, 

 Wallace, and Ixias baliensis, Friihst." — H. Rowland-Beown, Hon. Sec. 



[lELP-NOTES TOWARDS THE DETERMINATION OP LmiTISH 

 TENTEREDINIDM, &c. (17). 



BY THE KEV. P. D MORICE, M.A., F.E.S. 



H0PL0CAMPIDES = rHYLLOT0MA, Fall., HEPTAMELUS, Hal., 

 ERIOCAMPOIDES, Knw., ROPLOCAMPA, Htg. 



The Hoplocampides, as defined by Konow, include four British 

 Genera. One of these, Heptamelus, contains but a single species, H. 

 ochroleucus, Haliday. I know it only from the specimens in the 

 Cameron Coll. at 8. Kensington ; but any one fortunate enough to 

 find it should be able to identify it at once, as it possesses the unique 

 character of seyew -jointed antennae. A figure which, though un- 

 coloured, gives a good idea of the insect's general appearance, will be 

 found on Plate 13 of Mr. Cameron's Monograph (vol i). The other 

 three Genera contain insects having some resemblance to certain small 

 Nematids, and agreeing with that group in one important point — the 

 situation and direction of the discoidal (= basal) n. in the fore- 

 wings. They may be known from these, however, by combining three 

 characters, which do not appear together in any Nematid, viz., (1) 

 the radial cell is " divided," (2) the two medial nerves are received in 

 different cells, (3) the humeral area in the fore- wing is not " peliolate," 

 but either " contracted " {Roplocampa) or " with oblique cross ner- 

 vure " (^Fhyllotoma, Eriocampoides). 



Phtllotoma, Fall. 

 These are small and inconspicuous insects, not above 5 mm, long, 



