THE CANADIAN ENTOMOLOGIST. 335 



the lower, vertical diameter only slightly shorter than the longitudinal, 

 covered with stout bristles which are longest on the upper part of the head ; 

 eyes narrow, situated near middle of sides of head, no ocelli ; antennae in- 

 serted near lower part of the face, projecting obliquely forward and up- 

 ward, nearly as long as the head, apparently one-jointed, greatly depressed, 

 oval only slightly longer than broad, bristly and with a longer bristle 

 at apex of each. Thorax polished, depressed, about twice as long as high, 

 mesonotam covered with stout bristles, a median sulcus extending from 

 the front end to the transverse sulcus, which is at the last fifth of the 

 mesonotum. Wings inserted on the posterior end of the thorax, less than 

 twice as long as broad; halteres normal. Legs short, femora greatly swollen, 

 less than twice as long as thick, tibire flattened, as long as the femora but 

 less than half as wide, first four joints of tarsi subequal in length, much 

 wider than long, together as long as the fifth which is greatly swollen, 

 claws lobed at base of under side. Type, the following species : 



Aspidoptera Busckii n. sp. — Reddish yellow, the palpi and legs light 

 yellow, tarsal claws black, halteres white, head with a subtriangular black 

 spot each side of the middle of the upper side, abdomen opaque, tinged 

 with gray, only slightly longer than broad, bristly on each side at the 

 base and at the extreme apex, composed of two segments of which the 

 basal one is less than one-fifth as long as the other. Femora bearing 

 numerous bristles on tlie upper sides, the tibiae with a rather long 

 pubescence. Length 2 mm. A female specimen, found on a bat, 

 Artibeiis s^)., in a cave at Bayamon, Porto Rico, Jan. 15, 1899, by Mr. A, 

 Busck, after whom the species is named. Type No. 4210, U. S. Nat. 

 Museum. 



In Dr. Williston's recent manual the genus Ornithomyia is credited 

 with tridentate tarsal claws, while in Olfersia they are said to be bidentate. 

 As a matter of fact, the claws in these two genera are structurally 

 identical, each having two blunt-pointed teeth near the base of the 

 under side. Our Hippoboscid genera with fully developed wings 

 separate as follows : 



T. Anal cell closed by crossvein 2. 



Anal cell open to the wing-margin, ocelli wanting 4. 



2. Humeral angles projecting forward in the form of long tubercles, 

 antennae greatly depressed, not situated in cavities, projecting at least 

 nearly half the greatest diameter of the eyes in front of the latter . . .3. 

 Humeral angles rounded or only slightly projecting, antennte subovate, 

 situated in cavities, projecting less than one-fourth greatest diameter 

 of eyes in front o'i.\.\\t\a.\.itr ( Ornithomyia confluent a, 

 Say j Anthoica ? Rend. 



