670 Goleoioterological Notices, VI. 



THICANITS 11. gen. 



The few closely allied species forming this generic group are 

 somewhat intermediate between Lappus and Anthicus, but evi- 

 dently- cannot be associated with the former because of their much 

 shorter antennae and small fourth joint of the maxillar}' palpi, 

 w-hich has the form of a right-angled triangle, and, from Anthicus, 

 the}' differ in the lateral oblique extension of the mesosternum ; 

 from both of these genera the}' differ conspicuously in the form 

 of the prothorax. Those known to me may be mutually separated 

 as follows : — 



Head evenly and almost circularly rounded behind the eyes. 



Antennae rather strongly hut gi'adually clavate, the penultimate joints 



transverse. 



Punctures of the elytra rather close-set, especially toward the suture, 



those of the pronotuni very densely crowded toward hase..l. texaniis 



Punctures of the elytra rather coarser and decidedly more distant, those 



of the pronotum moderately dense toward base; size a little larger. 



2. rejectus 

 Antennffi more slender, very feebly enlarged toward apex, the penultimate 



Joint rather longer than wide 3. luinius 



Head prominent in the middle at base and rather narrowly rounded, the sides 

 thence \^x\ oblique for some distance, then rounded to the eyes. Pacific 

 coast. 

 Head sparselj' punctate; genital segment of the male feebly sinuate in arc 



at the middle, {annedens Lee. ) 4. califoriiicus 



Head densely punctate ; genital segment angularly and deeply emargiiiate at 

 apex 5. fraiiciscaiius 



The species of this genus resemble each other in general habi- 

 tus and color to an extreme degree, and if it were not for the 

 readily observable modifications of the sexual apparatus, it would 

 frequentlj^ be impossible to pronounce an}' definite opinion as to 

 their true status. In all of them there can be observed two 

 feeble transverse and very vague elevations near the basal mar- 

 gin of the pronotum. 



The intromittent apparatus of the male is very simple in struc- 

 ture, when compared with the homologous parts in Malporus. 



1. T. texaiius Laf. — Mon., p. 301 (Anthicus). 



Highly polished throughout, without trace of reticulation, 

 spai'sely but strongl}' punctate, the pubescence short and rather 

 coarse but sparse, without trace of erect seta; ; elytra clouded 



