Chaetoneurophora. 93 



of second segment are longer hairs. Legs with the front tibiæ with 

 one dorsal bristle, middle tibiæ with a pair of bristles near the base 

 and one near apex and hind tibiæ with from two to seven bristles 

 of which two anterior or anterodorsal and O — 5 dorsal; besides the 

 posterior tibiæ have long, ventral apical spurs; the legs for the rest 

 simply clothed with short hairs, only on the apical part on posterior 

 side of hind tibiæ there are special, short, bristly hairs arranged in 

 comb-like, transverse rows, and likewise on posterior side of meta- 

 tarsi; also the hairs on the anterodorsal side of the apical lialf of 

 middle tibiæ specially dense, a little long and arranged somewhat 

 in transverse rows, and the same arrangement of bristly hairs is 

 discernible at the apex of front tibiæ on the anterior side. Claws and 

 pulvilli normally developed; empodium bristle-shaped, small, but 

 distinct. Wings with costa beyond the middle; costal cilia short; 

 third vein forked and with a row of hairs in its whole length; fourth 

 to seventh veins present and reaching the margin or slightly abbrevi- 

 ated. 



With regard to the developmental stages the larva is, as far as 

 I see, not known; Bremi (Isis 1846, 172) mentions the larva of cali- 

 ginosa in larvæ of Crabro lituratus, but it is not described; whereas 

 the pupa of thoracica and caliginosa are known and mentioned by 

 Malloch (Ent. Month. Mag. 2, XIX, 1908, 203) as found in a mole's 

 nest in March and developing in April, and I have also examined the 

 pupæ of these two species. The pupa of thoracica was found in mole's 

 nests on ^/i and ^^4, the latter developing on ^^4, and that of caligi- 

 nosa was likewise taken in a mole's nest on ^^4 and developing on 

 ^^li — ^^U. The pupæ of the two species are quite similar, of the common 

 type such as occurring in Aphiochaeta rufipes; they are of oval circum- 

 ference, about equally arched on the ventral and dorsal surfaces, 

 with the greatest height in the anterior third and from here slanting 

 gradually towards the posterior end, but more abruptly towards the 

 anterior end; the lateral margin is pronounced though not sharp, 

 and with some small tubercles round the posterior end; otherwise 

 papillæ or processes are not or indistinctly visible so they are at all 

 events very small. The spiracular tubes are somewhat short, a little 

 curved and diverging, they are shorter, thicker, and more pointed 

 in thoracica than in caliginosa. I measured the pupa of thoracica to a 

 length of about 7 — 8 mm, that of caliginosa of about 4 — 5 mm. The 

 larva, as mentioned below, no doubt feed on carrion or perhaps upon 

 the whole on various decaying matters. The hibernation is, I think, 



