484 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION 



tion," be says, " was drawn to the spot by findiug a Rhyssa humida (Say) 

 with its ovipositor firmly driven into the wood. Upon cutting^ into the 

 stick, this specimen, together with a pupa of the male and several horn- 

 taile larvjB, were found. The antennse of the pupa are bent down upon 

 the sides of the face and up along the back of the head. One of the 

 larvae changed to pupa (female, length 0.32 inch) on the 21st of July. 

 The male agrees well with Norton's description as given in Trans. Am. 

 Eut. Soc. (ii, p. 354), and is very unlike the female." (Can. Ent., xi, p. 

 14, 1879.) 



Male. — "Pale honey yellow, antennae 16 jointed, blackish, two or three basal arti- 

 cles yellowish ; a spot inclosing ocelli, tip of mandibles, sides of neck, of meso, and 

 nietathorax blackish ; terguni irregularly dark ; pectus brown piceous ; body beneath 

 and legs whitish ; wings hyaline, nervures and stigma pale ; under wings with two 

 middle cells. Pennsylvania." (Norton.) 



Female. — " Head and thorax black ; tibiae and tarsi pale ; wings hyaline ; abdomen 

 red, with six yellow spots. Length 0.40 inch, expanse of wings 0.64 inch. 



"Antennae 16-jointed, black, piceous beneath, especially toward tip. Face below 

 and between antennae, palpi, and base of mandibles, fulvous. Eyes, except for a 

 short space above, bordered with yellow, the border covering nearly the whole cheek 

 and the anterior and posterior borders, extending backward to meet on the edge of 

 the occiput, thereby inclosing a spot above the eyes, which is black in the center 

 but shading through piceous into the yellow borders. Space about the ocelli finely 

 rugose, with delicate ridges radiating from each ocellus; vertex behind the ocelli 

 polished. A pit or deep puncture midway between the lower ocellus and the inser- 

 tion of the antennie. Thorax closely and finely rugulose ; scutellum and inclosure 

 on the basal plates i)olished. Teguhe, minute spots before the tegulae, one each side 

 above the anterior wing, and the cenchri, yellow. Trochanters, tips of coxae and of 

 femora dull yellow ; femora jiiceous, posterior pair black ; basal half of tibiae and 

 basal joints of tarsi, except at tip, yellow ; the remainder of tibiae and tarsi fulvous, 

 becoming brownish on the posterior tibiae. Wings hyaline, iridescent, nervures and 

 stigma pale piceous. Basal half of the first segment of the abdomen black and 

 roughened with fine confluent punctures ; the remainder of this segment and portions 

 of the terminal segment are darker than the other segments of the red polished abdo- 

 men. A yellow spot ou each side of segments 3, 4, and 7, those on the seventh seg- 

 ment being the largest. Sheath of the ovipositor black ; abdomen beneath, except 

 at base of ovipositor, red." (Patton.) 



2. Tremex columia Linn. 

 Order Hymenoptera ; family Urocerid^. 



Mrs. Dimmock gives the following summary of its history (Psyche, iv, 

 p. 285) : 



Tremex columba Linn. (Syst. Nat., 1758, ed. 10, p. 929). Harris (Rept. Ins. Injur, 

 Veg., 1841, p. 389-391) describes the egg, larva, and imago of this insect, giving wood 

 of pear, Ulmus, and Platanua as food of the larva ; and (Entom. Corresp., 1869, p. 360) 

 again describes the egg and imago. In Amer. Entom., Nov., 1868, v. i, p. 59, this 

 species is mentioned as injuring oak and pear trees. Packard (Guide Study Ins., 1869, 

 p. 228) quotes Harris's accounts of the habits of this species. Huggins (Amer. Entom., 

 Feb. 1870, v. 2, p. 128) found this insect ovipositing in an apple tree. Packard (Bull. 7. 

 U. S. Entom. Comm., 1881, p. 105, 106) figures the larva, which he states to attack 

 Ulmus, Quercus, Acer, and Platanus ; and {op. cit., p. 129) says, "In yellow birch at 

 Providence," R. I. Harrington (Can. Entom., Dec, 1882, v. 14, p. 225) gives some 

 notes upon this species and adds Fag us to the food-plants. 



