286 SUPPLEMENT. 



<$ . Hair of the frontal triangle and the face for the most part black ; basal third or fourth of the wings dark 

 brown. Length 7-12 millim. 



Hob. Mexico, Acaguizotla, Hacienda de la Imagen, Tierra Colorada, and Rincon in 



Guerrero (H. H. Smith). 



Numerous specimens. This species is very variable in size. It will be best 

 distinguished from the foregoing, B. io, by the colour of the basal joints of the antennae 

 and their hair, black in the latter, yellow in the former. 



5. Bombylius coquilletti, n. n. 



Tklipsogaster ater, Coquillett, Trans. Am. Ent. Soc. xxi. p. 108 (March 18)5) \ 

 Bombylius coquilletti, Will. Psyche, viii. p. 331 2 . 



Ilab. United States, Louisiana 1 . — Mexico, Dos Arroyos in Guerrero (H. H. Smith). 



A single male specimen from Guerrero, which seems to agree with. Coquillett's 

 description. This species does not belong to Thlipsog aster , as I have shown (I. c). 



6. Bombylius albopenicillatus. 



Bombylius albopenicillatus, Bigot, Ann. Soc. Ent. Fr. 1892, p. 363 (£) \ 



§ . Deep black, opaque. Front with appressed orange-coloured tomentum, and scattered, long, black hairs ; 

 face with long black hair, intermixed with orange hairs ; on either side of the base of the antennas with 

 a spot of appressed silvery-white pile. Antennas black ; first joint with black hair above ; third joint 

 longer than the first two together, slenderly fusiform in shape ; style short. Palpi black. Occiput with 

 abundant yellow hair above ; lateral orbits silvery- white-pilose. Mesonotum with orange tomentum, and 

 with six or eight silvery-white tomentose spots. Pleurae thinly greyish-pollinose and with light yellow 

 hair. Scutellum with orange torn on turn and long black hairs. Abdomen thinly covered with orange 

 tomentum, and sparse, long, black hair ; on the sides of the second and third segments with bushy black 

 hair ; the sides of the fourth, fifth, and sixth segments, and also those of the first in front, with light 

 yellow or silvery hair ; there is also some appressed silvery tomentum on each side of the first segment 

 behind, and a small spot in the middle of each following segment posteriorly. Legs yellow ; the tip of 

 the femora, the distal part of the tibiae, and the tarsi brownish ; hind femora with a row of long bristles 

 on the outer side. Wings tinged with brownish, more distinctly so at the base and in the costal and 

 subcostal cells ; anal cell open ; first posterior cell closed in the margin. Length 6-7 millim. 



d . Frontal triangle small ; hair of the antennas and face more bushy and longer ; usually without yellow hair 

 on the face. Front part of the mesonotum with long bushy and abundant yellow pile. Abdomen more 

 thickly black-pilose, the sides of the fourth, fifth, and sixth segments with longer and bushy white hair; 

 the yellow tomentum and silvery spots everywhere wanting. Wings darker brown at the base. 



Bab. Mexico 1 , Rincon and Acaguizotla in Guerrero (//. II. Smith). 



Two females and ten males. This and the' following species are closely allied 

 structurally to B. coquilletti, and may require a new genus for their reception. 



7. Bombylius dolorosus, sp. n. (Tab. V. fig. 8, 6 .) 



2 • Closely allied to B. albopenicillatus, Bigot. The tomentum of the front and mesonotum is of a deeper 

 rufous colour, the pile on the occiput is rufous (not orange-yellow), and there is no yellow pile on the 

 face or abdomen. The hair is deep black throughout, except on the occiput. The white tomentum of 

 the mesonotum is less in extent or evanescent ; on the abdomen there is a small spot on each side of the 



