1882.] 251 



rudimentary antennae and legs, very snort (0"09 mm.), and without ar- 

 ticulations. It is a very curious state, reminding one of the pseudo- 

 nymph of the Melo'idce. 



After six or eight days there is another change of skin, the exuviae 

 of the pseudo-nymph are thrown out of the cocoon, and the larva 

 takes the usual nymph appearance ; the legs are 049 mm. long, and 

 show their articulations. The antennae have ten joints. 



After another fortnight the exuviae of the nymph follow those 

 of the larva and pseudo-nymph, and the perfect imago remains in 

 the cocoon, while the two white tails project out of it, increasing 

 slowly in size. A few days after, the little animal comes out back- 

 wards, and runs about on the trunk of the maple, looking for its 

 female. They copulate and the male dies, then comes the turn of 

 the female to form her cocoon, to lay her eggs, — and the cycle begins 

 again. 



Montpellier : 2Qth February, 1882. 



P.S. — In the Wiener entomologische Zeitung, i, p. 60 (March, 

 1882), my learned friend, Dr. Franz Low, announces that he had 

 observed the economy of Ac antlio coccus aceris in 1877 and 1878, and 

 had discovered that the male was apterous. It does not appear to 

 have occurred to him to publish his important discovery until after I 

 had written to him requesting he would communicate to the zoolo- 

 gisch-botanischen Gresellschaft of Vienna, my own observations on 

 the insect, of which he makes no mention. — J. L. : 9th March, 1882. 



TWO NEW SPECIES OF ICHNEUMONID^. 



BY E. PAEFITT. 



POLYBLASTTJS BeIDGMANI, 71. Sp. 



Entire length, 6i mm. Expanse of wings, 13 mm. Abdomen, 

 3i mm. 



Niger, facie et linea ante alas et scutellum flavis. Abdominis medio 

 fulvo, segmenti primi basi nigra: pedibus fill 'vis, coxis et tro chant eribus 

 anticis et mediis flavis, posticis fulvis, tarsis posticis tibiarumque posti- 

 camun apice nigris. 



Head black, transverse, face below the antennse straw-yellow, jaws yellow, their 

 apices ferruginous, palpi yellow. Antennae longer than the body, black, the basal 

 joint beneath yellow. Thorax gibbous, black, finely punctured, with two raised 



