— 197— 



than the head, the two basal joints not as strong as in T. parviilum, 8 — 10 equal in 

 ieiiath, each twice as wide as the preceeding one, the last one-ioiirth longer than its 

 width and twice as wide as the tenth, ovate. The last palpal joint in the outline 

 securiform, but not compressed. Piothorax as long as wide, seemingly longer, equal 

 to one and one-half the length of the head, widest before the middle, sides evenly 

 arcuate, not perceptibly sinuate neai- the rather small lateral foveas which are con- 

 nected with the medial basal small fovea by a straight sulcus one-fourth the length of 

 the prothorax from the base; disk evenly convex, finely and densely punctured. 

 Elytra across the rounded shoulders as wide as the jirothorax, before the tip one- 

 third wider and the suture one-fourth longer ; disk convex, base with two arcuate 

 impressions leaving between them a broiid longitudinal ridge, which in proper light 

 may be traced to one-third of the elytral length. Abdomen with the first not longer 

 than the second, very convex with two very short basal carinte. Legs moderate, the 

 intermediate thighs lunate, convex anteriorly and nearly straight posteriorly, com- 

 pressed. The abundant pubescence makes the surface appear lustreless. 



Iowa. — On moist rotten wood with ants. Abundant in the time of 

 copulation in June. Diffeis from T. puncticolk by the impression on 

 the occiput and the presence of abdominal carina;. 



Articerus californicus n. sp. 



In size and color like Articerus fiuhsii from Tennessee, but is more slender in 

 form, the head in proportion shorter, the antennae darker and slightly arcuate, the 

 outlines of the tube-shaped last joint concave, which are in fuchsii straight lines, the 

 antennal cavities sharper, limited before the eyes and the root of the basal segment 

 less exposed. Otherwise in every respect like the well-known A. fiichsiL 

 Los Angeles, California. 



Note on Haematobia serrata R. Desv. 



By S. W. Williston. 



I have just learned, through the kindness of Professor Lintner, that 

 the Hc^maloiia cornicola, described by me in the September number of 

 Entom. Americana, had previously been identified through Baron Osten 

 Sacken with H. serrata R. Desvoidy, from France and Italy. I very 

 much regret the synonym, which only adds another proof that he who 

 treads on unfamihar ground finds plenty of pitfalls. Suspecting, as I did, 

 the identity of the two forms, I should have sent specimens for compari- 

 son. INIy only plea is that the multiplicity of my duties compels me to 

 gi\e up further study of our Diptera, for the time, at least. I leave them 

 with the less reluctance, knowing that Mr. Coquillet and Mr. W. M. 

 Wheeler are engaged upon them. Mr. Wheeler writes me that he is 

 making an especial study of the Leptidoe, and I know he will be thank- 

 ful for material.* 



* We shall have some remarks on this note in a future number. 



