THE CANADIAN ENTOMOLOGIST. 173 



circular, dull red in colour ; antennae transparent, slightly curved inwards, 



gradually tapering to a blunt apex ; lateral hair tuft reduced to a single 



simple stout hair, one-quarter the length of antenna, arising about half 



way up the shaft. Apex with four very short spines and a lamella ; 



surface of shaft entirely devoid of spines. A pair of stout simple hairs on 



cly[>eus. Mentum a wide angle of 20 rounded teeth. Several tufted 



hairs on the upper surface of the head near the bases of the antennae. 

 Thorax and abdomen with scattered tufted hairs, rays 5-20 elongated, 

 jagged at the eyes, some obsoletely feathered ; lateral hairs feathered. 

 Comb of twelve stout straight spines in a single row. Air tube sub- 

 cylindrical, about live tunes as long as broad (at the base), not swollen, 

 tapering gradually towards the summit. Pecten of two rows of simple 

 elongated spines, 24 in number, extending half way up the tube, with a 

 comj)ound 2-3-lid hair situated at the upper extremity of each, about the 

 middle of the tube. Chitinous plate of ninth segment narrow, saddle-shaped, 

 widely open below, with long spines along its posterior border, a large 

 simple hair at the posterior inferior border (corresponding to the digitate 

 hair in // Jl^^a/ken'). Ventral group of hairs springing from a diamond- 

 shaped plate. D()rsal group of two pairs, one compound, with short 

 branches, the other pair simple and of great length. A.nal papilke 

 narrowly conical, one-third the length' of the longest dorsal hairs. Pupa, 

 siphons long and narrow. Terminal appendages ovate, nearly equally 

 divided by mid rib. 



Obseuvatioxs. — The first specimen of this fine species was sent by 

 ('olonel Loscombe in vSeptember, 1905. Recently three l-Mvae were found 

 among a number of /I. IVa/keri larvae collected by Miss Maclaverty from 

 Eromelias, and sent to me alive. They were isolated and develoi)ed into 

 adult insects. The pu|)a stage in both this species and H. ]Va!keyi is 

 unusually long — 4 days. The chief points of difference between the two 

 s})ecies are to be found in the characters of the frontal hairs, hair tufts and 

 siphons. The chitinous covering of the thorax and abdomen of //. 

 aurcostriaUi is entirely devoid of the spicules so conspicuous in //. 

 Wa/keri, which give the latter its dark appearance. 



7. Dendromyin} nov. sp. — A much-broken specimen of $ was sent 

 by C'olonel Loscombe, not in a condition to allow of a satisfactory 

 description. The mid legs have triangular basal areas of white scales 

 quite unlike any other species of the genus. 



