442 Pomona College Journal of Entomology 



terior ocellus at apex or eniargination, visible from above. Facial cones en- 

 tirely wanting; face slightly swollen beneath each antennal insertion and 

 sparsely pubescent. Antennae inserted on truncate termination of rostrate 

 lobes ; basal segment very large and broad, almost as broad as anterior margin 

 of projecting lobes ; second segment smaller ; third segment longer than fourth 

 and fifth combined, slender, not broader than succeeding segments. Labrum 

 moderately large, posterior. 



Thora.x scarcely arched, quite coarsely punctate. Pronotum moderately 

 long, somewhat arched, not depressed below head and dorsulum ; lateral im- 

 pressions rather elongate, posterior ; pleurites large. Dorsulum small. An- 

 terior femora of normal length and thickness, scarcely arcuate. IVings hyaline, 

 small, about two and a half times as long as broad, broadest across base of 

 first marginal cell, subacute apically ; radius shorter than second cubital ; 

 marginal cells subequal ; fourth furcal terminating above apex of wing; vena- 

 tion light, inconspicuous. 



Male. — Abdomen moderately stout ; white ventrad, black dorsad. Genital 

 segment small, not much larger than preceding ventral sclerite ; claspers small, 

 subglobose basally, slender and acute apically ; pubescence short and sparse. 

 .■\nal valve about equal in size to ventral plate, almost straight on inner 

 margin, strongly arched posteriorly ; pubescence longer than on genital plate 

 and claspers. 



Described from two males collected in Colorado, by C. F. r)aker. Type in 

 Nat. Museum. 



Rhinopsylla antennata proxima n. var. 



The chief variation from the species lies in the cephalic characters. The 

 anterior eniargination is less pronounced and the basal segments of the an- 

 tennae are distinctly smaller, but of the same type. The sulcate depression 

 on the vertex is more marked. The facial cones are entirely wanting but the 

 enlargements under the antennal insertions are more distinct. The color is 

 lighter in the variety, but this is not necessarily a varietal character. 



Described from one female collected in Colorado, by C. F. I'.aker. 



Allotrioza n. gen. 



Pronotum long, usually quite flat, not depressed below dorsulum and head ; 

 notum not .strongly arched. Head not deflexed ; vertex usuall}- with a deep 

 fovea posteriorly on each side of the median suture and more or less of a de- 

 pression extending forward. Facial cones short, very broadly rounded apicall_\-. 

 quite horizontal ; labrum often visible from in front. 



Wings quite acutely rounded apically ; first marginal cell larger than second ; 

 first cubital vein comparatively short, scarcely ever more than twice as long 

 as first furcal, sometimes equal in length to first furcal. 



Type of genus : Allotrioza arbolensis Crawf. 



Synopsis of the Genus Allotrioza 



A. Wings not entirely clear, more or less maculated. Ivicial cones subacute 

 viewed from side. IVoepisternum almost horizontal ; epinieron inferior. 



