ART. 20 TAXOISrOMY OF BITIFG LICE EWING O 



Metathorax considerably larger than the mesothorax, over twice 

 as broad as long and with greatly thickened lateral walls. It bears 

 three pairs of short dorsal discal setee and a row of mixed long and 

 short ones on the posterior margin. 



Abdomen almost twice as long as broad and somewhat swollen in 

 the middle. Basal plate of male genital armature decidedly rod- 

 like and extending forward into the third abdominal segment ; para- 

 meres slender, gently incurved and surpassing the endomeres by 

 almost. half their length; endomeres free, more or less spatulate, not 

 united, even at their bases. 



Legs short for the genus with the pseudoarticulations of the tibise 

 very evident ; first femora broader than long ; patches of setse on last 

 femora extending along over one-half the length of the segment. 



Length of male, 1.80 mm. ; width, 0.70 mm. 



Type host. — Richmond's swift, Ghaetura ricJiTnondi. 



Type {cotype) .—C2it. No. 42760, U.S.N.M. 



Described from two males ; one from type host, Eden, Nicaragua, 

 1922 (W. Huber), the other, an evident straggler, from boat-billed 

 flycatcher, Megarynchus pUangua., Eden, Nicaragua, 1922 (W. Hu- 

 ber). This species is very distinct in the characters of the prosternal 

 plate, the setae on the temporal lobes and in having much shorter 

 femora than most of the others. It is named in honor of Dr. C. W. 

 Richmond, of the United States National Museum, for whom the 

 bird host was named a number of years ago. 



DENNYUS (D-ENNYUS) AUSTRALIS, new species 



Head of typical shape for the subgenus ; forehead strongly arched 

 in front and with slight lateral angles; temples quadrangular, with 

 posterior angles rounded. Eyes with fused double corneas but with 

 a single pigment spot. The two inner pairs of the marginal setae 

 of temporal lobes subequal and very long, being equal in length to 

 any of the setae of the head. Occipital setse equally spaced and over 

 two-thirds as long as the prothorax. 



Prothorax broader than long; lateral pronotal lobes pronounced, 

 each bearing two long setae and two short spines. Prosternal plate 

 with very heavy lateral borders, and bearing about half a dozen mod- 

 erate setae in addition to the anterior pair of minute setae. 



Mesothorax over twice as broad as long, separated from meta- 

 thorax by a distinct dorsal suture. Its lateral margins are slightly 

 rounded outwardly and the posterior border is subangulate at the 

 median line. The mesothorax is covered above in part by the back- 

 warclly projecting pronotum and bears no dorsal setae. 



Metathorax over twice as broad as long, with almost straight 

 divergent sides; dorsally it bears three pairs of small, short, discal 

 setae and a posterior marginal row of long setae. 



