1671.] ON NEW INSECTS FROM YUNAN. 249 



it differs in being covered with a short glittering pilosity, and its 

 clypeus is smooth, shining, and impunctate. 



2. Bombus impetuosus, Smith, n. sp. (Plate XVIII. fig. 8.) 



Female. Black ; the pubescence on the head black. The thorax 

 above and at the sides clothed with a rich fulvous pubescence ; the 

 disk with black pubescence between the wings ; the apical joints of 

 the anterior and intermediate tarsi and the posterior pair entirely 

 obscure rufo-piceous ; the posterior tibiae have their outer margin of 

 the same colour, but brighter ; wings dark brown. Abdomen : the 

 basal segment is covered above with bright pale fulvous pubescence, 

 the two following segments have a clothing of black pubescence, and 

 the three apical ones of red. Length 9 lines. 



The worker is clothed like the female, but the fulvous pubescence 

 is brighter and paler, and it varies in size from 8 to 10 lines. 



3. Apis laboriosa, Smith, n. sp. (Plate XVIII. fig. 7.) 



Worker. Black ; the vertex shining and having some long black 

 pubescence ; the face just above the insertion of the antennae with 

 fulvous pubescence ; the eyes have a short black pubescence and a 

 few scattered punctures ; the cheeks covered with pale fulvous pu- 

 bescence. Thorax clothed with fulvous pubescence, which is palest 

 beneath and on the inferior margins of the anterior and intermediate 

 femora ; the posterior femorn more thinly fringed with pale fulvous 

 pubescence ; the posterior tibiae and the basal joint of the tarsi 

 fringed with black pubescence ; the superior wings slightly smoky 

 or fuscous, darkest in the marginal and first submarginal cell. Ab- 

 domen almost naked, but with. a little fulvous pubescence on the 

 margin of the basal segment ; the truncation of the basal segment 

 covered with fine short downy fulvous pubescence ; the apex of the 

 abdomen with a little black pubescence. Length 8 lines. 



I cannot but consider this a distinct species from all that have 

 hitherto been described. I am not desirous of increasing the num- 

 ber ; but, after a careful examination of the characters in which 

 specific distinctions are to be found, I will point out in what this 

 Bee differs from both A. dorsata and A. sonata, both of which agree 

 with it in size. The ocelli are smaller and more distant from the 

 compound eyes ; and it has only twelve transverse rows of bristles 

 on the inner surface of the posterior metatarsus, exclusive of tbat on 

 its apical margin. In A. dorsata the abdomen is covered above with 

 a short downy pubescence ; this Bee has the abdomen naked, and 

 there is not a trace of bands of pubescence at the basal margins of 

 the segments, as in A. zonata. 



DESCRIPTION OF PLATE XVIII. 



Fig. 1. Byntomis andersoni, p. 244. 



2. atkinsoni, p. 245. 



3. fytchei, p. 246. 



4. grotei, p. 245. 



Fig. 5. Syntomis sladeni, p. 245. 



6. Vespa bellona, p. 248. 



7. Apis laboriosa, p. 249. 



8. Bombus impetuosus, p. 249. 



