THE CANADIAN ENTOMOLOGIST. 81 



that it might be the white-banded form of some undescribed species. Mr. 

 Broadwell has another specimen in which the central band is suffused, 

 and the whole insect has a grayish appearance. Types, 2 S'^, in ^Ir. 

 Broadwell's coll., Newark, N. J. 



6. Hyd. pernotata Hulst, Can. Ent., XXX, j). 117, 1898. 

 Short palpi, gray. Said by Dr. Dyar "to be Hyd. inagnoliata.'" 

 This species seems very hard to }}ldce, and as I have not seen the 



type, I cannot say exactly what it is like, but, according to the description, 

 it belongs to the short-palpi grouj). The type is from Fort Wrangel, 

 Alaska, and is in the U. S. National Museum. 



7. Hyd. irata Swett, Can. Ent., Vol. XLII, p. 280, Aug., 1910. 

 Short palpi, gray, reddish suffused. 



This is a very peculiar species, and looks almost exactly like cali- 

 forniata Pack., except that it lacks the longer palpi and has subdentate 

 antennae. It also resembles \rx. perfracta Swett, oi autiunnalis, but differs 

 again in the antennae and palpi, and also in the black lines across the 

 mesial space on veins 2 and 3. The peculiar antennae would almost seem 

 to place it out of the sordidata group, as it really lacks the smooth flattened 

 antennae of that group, in some specimens being very subdentate. No 

 doubt this species has been confused with caiiforniata Pack., but its 

 earlier appearance (in May, where caiiforniata flies in July) will also help 

 to separate them. The females apj)ear to be quite rare, as Mr. Croker, 

 who kindly sent me a series of males, stated that he took but one or two. 



This includes all the species and varieties of the short-palpi grouj) so 

 far as known. By "short palpi," I mean hardly projecting beyond the 

 head, or i mm. in length. The "mesial band" is the group of three bands 

 forming the basal, second and intradiscal. The mesial space is the area 

 between intradiscal and extradiscal lines. In regard to the colour 

 varieties, I am opposed to giving every form a name, as it would fill up 

 the catalogue unnecessarily, and I do it only where variable species 

 could be confused, as it would be impossible to separate the species 

 if this were not done, e.g.^ the red varieties of mibilofasciata ^ud/urcatay 

 caiiforniata and var. perfracta Swett, o{ autinnnalis. The colour scheme 

 seems to woik out well, and gives us the first means of separating an 

 unwieldly mass of specimens, but the palpi seem to be the most important 

 character, as we know in which of the three groups — short, moderate or 

 long — to place it. There is possibly one change to be made later in the 

 colour scheme regarding green and ytUow. I notice that specimens 

 emerge yellow, while others, at first green, turn yellow after flying for some 



