REPORT OF THE STATE ENTOMOLOGIST 1912 191 



than the third. Entire body a nearly uniform dark brown. Wings 

 hyaline, costa light brown ; subcosta uniting with the anterior margin 

 near the basal half. Halteres yellowish basally, light fuscous api- 

 cally. Legs a light yellowish brown, the distal tarsal segments 

 somewhat darker; claws long, slender, strongly curved, simple, the 

 pulvilli as long as the claws. Genitalia; basal clasp segment short, 

 stout, the internal distal angle produced as a long, roundly tapering 

 process ; terminal clasp segment short, stout, greatly dilated near 

 the basal third, broadly rounded. Dorsal plate long, stout, broadly 

 rounded. Harpes short, broad, each with a pair of long retrorse 

 spines ; style long, slender, subacute. Type Cecid. 1259. 



Monardia lignivora Felt 



1907 Felt, K P. N. Y. State Mus. Bui. no, p. 100; separate, p. 4 

 (Campylomyza) 



1908 N. Y. State Mus. Bui. 124, p. 314, 315 (Campylomyza) 



1909 Ent. Soc. Ont. 39th Rep't, p. 44 (Campylomyza) 



Many larvae and a number of adults of this interesting form were 

 taken September 21, 1906 in the fungus-affected heartwood of an 

 18 inch hard pine, Pin us rigida, at Davidson's River, N. C. 

 The tree had been cut into the 20th of the preceding July for the 

 purpose of observing the progress of a fungus affection. This un- 

 doubtedly gave the gnats an opportunity to enter and at the time of 

 their discovery they had worked their way among the spongy tissues. 

 The flies had probably oviposited in crevices and galleries a con- 

 siderable distance from the cut surface. Larvae, pupae and adults 

 were found in the affected wood at least three inches above the cut 

 and fully two inches behind the deepest part. The affected wood, 

 either as the result of fungous attack or because of the operations of 

 the Cecid larvae, was quite spongy and contained numerous lenticular 

 cavities. It was well charged with pitch. The Dipterous larvae ap- 

 peared to erode the smooth surface of the wood, even that apparently 

 hard and sound and, as a result, produced quantities of very fine, 

 yellowish wood powder. Full-grown larvae to the number of fifteen 

 to twenty were taken in a smooth channel about 6 mm in diameter 

 and 5 cm long. Other larvae occurred singly and the same was true 

 of pupae. Exuviae or pupal skins were so numerous on portions of 

 the cut surface as to literally cover it, especially the more spongy 

 portions. 



Larva. Length 6 mm, slender, light salmon. Head small ; an- 

 tennae stout, apparently uniarticulate ; breastbone stout, well de- 

 veloped, tridentate, the median tooth largest, the shaft slender, 

 slightly expanded distally. Skin nearly smooth ; the segments pos- 

 teriorly with transverse rows of minute spines as in Miastor larvae. 

 Terminal segment broadly rounded. (Plate 13, figure 4.) 



