—197— 
than the head, the two basal joints not as strong as in 7. parvelum, 8-10 equal in 
length, each twice as wide as the preceeding one, the last one-fourth longer than its 
width and twice as wide as the tenth, ovate. The last palpal joint in the outline 
securiform, but not compressed. Prothorax 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 near the rather small lateral fovese 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 prothorax, before the tip one- 
third wider and the suture one-fourth longer; disk convex, base with two arcuate 
impressions leaving between them a broed 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 carine. 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. Differs from Z. puncticolle by the impression on 
the occiput and the presence of abdominal carine. 
Articerus californicus n. sp. 
In size and color like Articerus fuchsii from Tennessee, but is more slender in 
form, the head in proportion shorter, the antenne darker and slightly arcuate, the 
outlines of the tube-shaped last joint concave, which are in /wchsii 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 4. /uchsiv. 
Los Angeles, California. 
————+) + _———— 
Note on Hzematobia serrata R. Desv. 
By S. W. WILLIsToN. 
I have just learned, through the kindness of Professor Lintner, that 
the Hematobia cornicola, described by me in the September number of 
Entom. Americana, had previously been identified through Baron Osten 
Sacken with A. serrata R. Desvoidy, from France and Italy. I very 
much regret the synonym, which only adds another proof that he who 
treads on unfamiliar ground finds plenty of pitfalls. Suspecting, as I did, 
the identity of the two forms, I should have sent specimens for compari- 
son. My only plea is that the multiplicity of my duties compels me to 
give 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 Leptidz, and I know he will be thank- 
ful for material. * 
* We shall have some remarks on this note in a future number. 
