CONTRIBUTIONS TO OUR KNOWLEDGE OF BRITISH BKAGONIDiE. 197 



A. lacifugus, sp. nov. 



Black ; palpi pale ; belly at base and legs testaceous : fore 

 and middle coxae chocolate-brown ; hind coxae black ; hind femora 

 sometimes very slightly infuscate at apex and sides ; apical half of 

 hind tibiae dark ; hind tarsi infuscate, with the base paler ; hind 

 coxaj above smooth and shining, wings hyaline, stigma pale 

 fuscous, nervures mostly pale ; first abscissa of radius and first inter- 

 cubital nervure united in one curve without any sign of an elbow 

 at the point of junction. Antennae rather longer than the body. 

 Mesothorax very finely punctulate ; scutellum smooth ; metathorax 

 smooth, apically feebly acciculated in centre, laterally and apically 

 margined by a fine raised ridge. First abdominal segment more 

 than twice as long as its medial breadth, sides parallel for two thirds 

 of its length, then converging to a blunt point ; second as long as 

 third, with two deeply impressed converging lines enclosing a smooth 

 space, the centre of which is raised ; other segments smooth and 

 shining ; segments 1 and 2 laterally bordered with testaceous or 

 fusco testaceous. Terebra short, not surpassing the apex of the 

 abdomen; spurs of middle tibiae curved at apex. Length, 2 mm. ; 

 expands, 5 mm. 



Described from nine males and three females out of a brood 

 of thirteen, bred from a larva of either Laspeyria flexula or 

 LitJiosia deplana, probably the former, June 20th, 1911. 



The neuration of the upper wing will easily distinguish this 

 species from all others in the section with the exception of 

 hicolor, which it somewhat resembles ; in bicolor, however, the 

 terebra is at least one fourth as long as the abdomen. 



Cocoons almost smooth, pure white, and, in the only case I 

 have observed, attached in an irregular cluster to the bark of a 

 piue-tree, 3| mm. in length (PI. II, fig. 5). 



A. lautellus, Marsh.* 



I have seven females which I believe I am right in referring 

 to the dark form of this species as described by Marshall. 

 Typical specimens, with which I have never met, are said to 

 have the first four abdominal segments testaceous. In some of 

 mine the first three are edged with testaceous, but no more ; 

 the apex of the hind tibiae infuscate, and in the darker specimens 

 the hind and even middle femora edged with fuscous above 

 and below, the hind and middle coxae being dark also. My 

 largest, bred from Paramesia ferragana, expands 7 mm. ; the 

 smallest, from Lithocolletis coryli, less than 5 mm. 



The cocoon is very curious, being cylindrical, smooth, white, 

 papyraceous, and transparent ; it is slung, hammock-like, by 

 threads of silk attached to either extremity, across the larva! 

 chamber of the host. When found in the well-known chambtM 



* 'Traus. Kntom. Soc.,' 1885, p. 219. 



