AMERICAN HYMENOPTERA. 387 



wide, extending back beliind the eyes nearly as far as before, formed as 

 in L. jilagiata and ochrocera ; margin of clypeus truncate, not roun- 

 ded ; a little protruded tooth on each side at the base of mandibles ; 

 nasus, base and outer side of mandibles, a slender spot from mandi- 

 bles to eyes, a ci'escent shaped line extending from the inner summit 

 of each eye over the back of head to neck, straw white; tegulse, upper 

 edge of anterior angle, scutel and postscutel, three spots on pleura, one 

 over each of the coxae, tip of anal segment, and the legs down the basal 

 end of tibijB, straw-white; tip of mandibles, a large spot covering most 

 of the second, third and fourth segments of tergum and the legs below 

 the knees, rufous or honey yellow; basal patches and first segment of 

 tergum substriatc laterally ; wings faintly clouded; nervures brownish 

 black. 



11. Lyda excavata, n. sp. 



Length 0.2S. Br. wings, 0.62 inch. 



% . — Color black; the first and basal half of second joints of anten- 

 nae, face below ocelli, except a black line above each antenna, cheeks, 

 tegulfc. spot on prothorax, scutel and postscutel, sides of basal plates, 

 lower half of anterior angle, pleura, a spot above hinder eoxiis, venter. 

 legs behind the middle of femora, straw-white; a spot on the tip of the 

 first and most of the second and third segments of tergum and the 

 lower half of legs, yellow-red; antennae slender, longer than thorax, 

 setiform, the third joint as long as fourth and fifth. Head not unu- 

 sually prolonged behind the eyes; a deep wide basin occupies the 

 lower half of face, enclosing the antennae, with a very irregular carina 

 around all its borders, forming a sort of M above the antennae and an 

 inverted T below, on the nasus. A carina runs from between the an- 

 tennae down the nasus ; wings as usual, hyaline, cross-nervure of third 

 brachial nearly complete ; claws stout. 

 Canada. Rev. L. Provancher. 



1 2. Lyda pallimacula, n. sp. 



Black, with yellow spots and crescents on head, thorax and pleura; abdo- 

 men rufescent. Length 0.44. Br. wings 0.90 inch. 



9 . — Shining black; antennae 26-jointed, the third more than one-half 

 longer than fourth, the final joint longer than that preceding, the third, 

 fourth and fifth joints slightly serrate and flattened, head rugose below 

 ocelli, smooth above, and with the thorax, sparsely punctured ; two oval 

 spots above ocelli, enclosed by two crescents, enlarged at ends but nut 

 connected, which touch the occiput and eyes within the cheeks, edges 

 of nasus and labrum, base of mandibles and palpi, yellow white; tegula?. 

 lower half of anterior angle, V-spot, scutel, post-scutel, line beneath, 



TKANS. AMER. ENT. SOC. (44) JL.VE, 18t)it. 



